diff --git a/Makefile b/Makefile
index 9bd51b8..652c1e2 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ include base.mk
 include common.mk
 include headers.mk
 
-OPT = -Og
+OPT = -O2
 MAKEFILE_PATH := $(patsubst %/,%,$(dir $(abspath $(firstword $(MAKEFILE_LIST)))))
 CFLAGS += -I$(MAKEFILE_PATH)
 LIB ?= $(MAKEFILE_PATH)
diff --git a/example/example.mk b/example/example.mk
index f7594ed..3e8b068 100644
--- a/example/example.mk
+++ b/example/example.mk
@@ -859,3 +859,17 @@ SPECK_OBJ = \
 
 example/speck.elf: LDSCRIPT = $(LIB)/main.lds
 example/speck.elf: $(START_OBJ) $(SPECK_OBJ)
+
+MODIFIER_VOLUME_CUBE_OBJ = \
+	example/modifier_volume_cube.o \
+	holly/core.o \
+	holly/region_array.o \
+	holly/background.o \
+	holly/ta_fifo_polygon_converter.o \
+	holly/video_output.o \
+	sh7091/serial.o \
+	font/terminus/ter_u32n.data.o \
+	$(LIBGCC)
+
+example/modifier_volume_cube.elf: LDSCRIPT = $(LIB)/main.lds
+example/modifier_volume_cube.elf: $(START_OBJ) $(MODIFIER_VOLUME_CUBE_OBJ)
diff --git a/example/modifier_volume_cube.cpp b/example/modifier_volume_cube.cpp
new file mode 100644
index 0000000..5017f5b
--- /dev/null
+++ b/example/modifier_volume_cube.cpp
@@ -0,0 +1,912 @@
+#include <stdint.h>
+
+#include "holly/background.hpp"
+#include "holly/core.hpp"
+#include "holly/core_bits.hpp"
+#include "holly/holly.hpp"
+#include "holly/isp_tsp.hpp"
+#include "holly/region_array.hpp"
+#include "holly/ta_bits.hpp"
+#include "holly/ta_fifo_polygon_converter.hpp"
+#include "holly/ta_global_parameter.hpp"
+#include "holly/ta_parameter.hpp"
+#include "holly/ta_vertex_parameter.hpp"
+#include "holly/texture_memory_alloc3.hpp"
+#include "holly/video_output.hpp"
+
+#include "sh7091/sh7091.hpp"
+#include "sh7091/serial.hpp"
+
+#include "systembus.hpp"
+#include "systembus_bits.hpp"
+
+#include "memorymap.hpp"
+
+#include "model/model.h"
+#include "model/cube.h"
+#include "model/plane/model.h"
+
+#include "font/terminus/ter_u32n.data.h"
+
+#include "math/vec2.hpp"
+#include "math/vec3.hpp"
+#include "math/vec4.hpp"
+#include "math/mat3x3.hpp"
+#include "math/mat4x4.hpp"
+#include "math/math.hpp"
+
+#define assert(b)                                                       \
+  do {                                                                  \
+    if (!(b)) {                                                         \
+      serial::string(__FILE__);                                         \
+      serial::character(':');                                           \
+      serial::integer<uint32_t>(__LINE__, ' ');                         \
+      serial::string(__func__);                                         \
+      serial::string(": assertion failed: ");                           \
+      serial::string(#b);                                               \
+      serial::character('\n');                                          \
+      while (1);                                                        \
+    }                                                                   \
+  } while (0);
+
+using vec2 = vec<2, float>;
+using vec3 = vec<3, float>;
+using vec4 = vec<4, float>;
+using mat3x3 = mat<3, 3, float>;
+using mat4x4 = mat<4, 4, float>;
+
+const float deg = 0.017453292519943295;
+
+#define _fsrra(n)                              \
+  ({                                           \
+    float v = (n);                             \
+    asm("fsrra %0"                             \
+        : "=f" (v)                             \
+        : "0" (v));                            \
+    v;                                         \
+  })
+
+static inline int max(int a, int b)
+{
+  return (a > b) ? a : b;
+}
+
+static inline int min(int a, int b)
+{
+  return (a > b) ? b : a;
+}
+
+void global_polygon_type_0(ta_parameter_writer& writer, bool shadow)
+{
+  const uint32_t parameter_control_word = para_control::para_type::polygon_or_modifier_volume
+                                        | para_control::list_type::opaque
+                                        | obj_control::col_type::packed_color
+                                        | (shadow ? obj_control::shadow : 0)
+                                        ;
+
+  const uint32_t isp_tsp_instruction_word = isp_tsp_instruction_word::depth_compare_mode::greater
+                                          | isp_tsp_instruction_word::culling_mode::no_culling;
+
+  const uint32_t tsp_instruction_word = tsp_instruction_word::fog_control::no_fog
+                                      | tsp_instruction_word::src_alpha_instr::one
+                                      | tsp_instruction_word::dst_alpha_instr::zero
+                                      ;
+
+  const uint32_t texture_control_word = 0;
+
+  writer.append<ta_global_parameter::polygon_type_0>() =
+    ta_global_parameter::polygon_type_0(parameter_control_word,
+                                        isp_tsp_instruction_word,
+                                        tsp_instruction_word,
+                                        texture_control_word,
+                                        0, // data_size_for_sort_dma
+                                        0  // next_address_for_sort_dma
+                                        );
+}
+
+void global_modifier_volume(ta_parameter_writer& writer)
+{
+  const uint32_t parameter_control_word = para_control::para_type::polygon_or_modifier_volume
+                                        | para_control::list_type::opaque_modifier_volume
+                                        ;
+
+  const uint32_t isp_tsp_instruction_word = isp_tsp_instruction_word::volume_instruction::normal_polygon
+                                          | isp_tsp_instruction_word::culling_mode::no_culling;
+
+  writer.append<ta_global_parameter::modifier_volume>() =
+    ta_global_parameter::modifier_volume(parameter_control_word,
+					 isp_tsp_instruction_word
+					 );
+}
+
+void transfer_line(ta_parameter_writer& writer, vec3 p1, vec3 p2, uint32_t base_color)
+{
+  /*
+  const uint32_t parameter_control_word = para_control::para_type::sprite
+                                        | para_control::list_type::opaque
+                                        | obj_control::col_type::packed_color;
+
+  const uint32_t isp_tsp_instruction_word = isp_tsp_instruction_word::depth_compare_mode::greater
+                                          | isp_tsp_instruction_word::culling_mode::no_culling;
+
+  const uint32_t tsp_instruction_word = tsp_instruction_word::fog_control::no_fog
+                                      | tsp_instruction_word::src_alpha_instr::one
+                                      | tsp_instruction_word::dst_alpha_instr::zero
+                                      ;
+
+  const uint32_t texture_control_word = 0;
+  */
+
+  float dy = p2.y - p1.y;
+  float dx = p2.x - p1.x;
+  float d = _fsrra(dx * dx + dy * dy) * 0.7f;
+  float dy1 = dy * d;
+  float dx1 = dx * d;
+
+  assert(p1.z < 1);
+  assert(p2.z < 1);
+
+  const vec3 v[4] = {
+    { p1.x +  dy1, p1.y + -dx1, p1.z },
+    { p1.x + -dy1, p1.y +  dx1, p1.z },
+    { p2.x + -dy1, p2.y +  dx1, p2.z },
+    { p2.x +  dy1, p2.y + -dx1, p2.z },
+  };
+
+  /*
+  writer.append<ta_global_parameter::sprite>() =
+    ta_global_parameter::sprite(parameter_control_word,
+                                isp_tsp_instruction_word,
+                                tsp_instruction_word,
+                                texture_control_word,
+                                base_color,
+                                0,  // offset_color
+                                0,  // data_size_for_sort_dma
+                                0); // next_address_for_sort_dma
+  */
+  writer.append<ta_vertex_parameter::polygon_type_0>() =
+    ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(false),
+                                        v[0].x, v[0].y, v[0].z,
+                                        base_color);
+
+  writer.append<ta_vertex_parameter::polygon_type_0>() =
+    ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(false),
+                                        v[1].x, v[1].y, v[1].z,
+                                        base_color);
+
+  writer.append<ta_vertex_parameter::polygon_type_0>() =
+    ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(false),
+                                        v[3].x, v[3].y, v[3].z,
+                                        base_color);
+
+  writer.append<ta_vertex_parameter::polygon_type_0>() =
+    ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(true),
+                                        v[2].x, v[2].y, v[2].z,
+                                        base_color);
+}
+
+void transfer_glyph(ta_parameter_writer& writer, float x, float y, int c)
+{
+  constexpr int width = 16;
+  constexpr int height = 32;
+
+  const uint32_t parameter_control_word = para_control::para_type::sprite
+                                        | para_control::list_type::punch_through
+                                        | obj_control::col_type::packed_color
+                                        | obj_control::texture;
+
+  const uint32_t isp_tsp_instruction_word = isp_tsp_instruction_word::depth_compare_mode::greater
+                                          | isp_tsp_instruction_word::culling_mode::no_culling;
+
+  const uint32_t tsp_instruction_word = tsp_instruction_word::fog_control::no_fog
+                                      | tsp_instruction_word::src_alpha_instr::src_alpha
+                                      | tsp_instruction_word::dst_alpha_instr::inverse_src_alpha
+                                      | tsp_instruction_word::texture_u_size::from_int(width)
+                                      | tsp_instruction_word::texture_v_size::from_int(height);
+
+  const int ix = c - ' ';
+  const int offset = (width * height * ix) / 2;
+  const uint32_t texture_address = texture_memory_alloc.texture.start + offset;
+  const uint32_t texture_control_word = texture_control_word::pixel_format::_4bpp_palette
+                                      | texture_control_word::scan_order::twiddled
+                                      | texture_control_word::texture_address(texture_address / 8);
+
+  constexpr vec2 v[4] = {
+    { 0.f, 0.f },
+    { 1.f, 0.f },
+    { 1.f, 1.f },
+    { 0.f, 1.f },
+  };
+
+  constexpr uint32_t base_color = 0;
+  writer.append<ta_global_parameter::sprite>() =
+    ta_global_parameter::sprite(parameter_control_word,
+                                isp_tsp_instruction_word,
+                                tsp_instruction_word,
+                                texture_control_word,
+                                base_color,
+                                0,  // offset_color
+                                0,  // data_size_for_sort_dma
+                                0); // next_address_for_sort_dma
+
+  writer.append<ta_vertex_parameter::sprite_type_1>() =
+    ta_vertex_parameter::sprite_type_1(para_control::para_type::vertex_parameter,
+				       v[0].x * width  + x,
+				       v[0].y * height + y,
+				       0.1f,
+				       v[1].x * width  + x,
+				       v[1].y * height + y,
+				       0.1f,
+				       v[2].x * width  + x,
+				       v[2].y * height + y,
+				       0.1f,
+				       v[3].x * width  + x,
+				       v[3].y * height + y,
+                                       uv_16bit(v[0].x, v[0].y),
+                                       uv_16bit(v[1].x, v[1].y),
+				       uv_16bit(v[2].x, v[2].y));
+}
+
+vec3 screen_transform(const mat4x4& screen, vec3 v)
+{
+  v = screen * v;
+
+  float dim = 480 / 2.0 * 1.5;
+
+  return {
+    v.x / v.z * dim + 640 / 2.0f,
+    v.y / v.z * dim + 480 / 2.0f,
+    1 / v.z,
+  };
+}
+
+void render_basis(ta_parameter_writer& writer, const mat4x4& screen)
+{
+  global_polygon_type_0(writer, false);
+
+  vec3 origin = screen_transform(screen, {0, 0, 0});
+  vec3 z = screen_transform(screen, {0, 0, 1});
+  vec3 y = screen_transform(screen, {0, 1, 0});
+  vec3 x = screen_transform(screen, {1, 0, 0});
+
+  uint32_t base_color = 0xffffff;
+
+  // magenta: Z
+  transfer_line(writer, origin, z, base_color);
+
+  // yellow: Y
+  transfer_line(writer, origin, y, base_color);
+
+  // cyan: X
+  transfer_line(writer, origin, x, base_color);
+}
+
+void render_basis_text(ta_parameter_writer& writer, const mat4x4& screen)
+{
+  vec3 z = screen_transform(screen, (vec3){0, 0, 1} * 1.2f);
+  vec3 y = screen_transform(screen, (vec3){0, 1, 0} * 1.2f);
+  vec3 x = screen_transform(screen, (vec3){1, 0, 0} * 1.2f);
+
+  transfer_glyph(writer, z.x - 5, z.y - 10, 'z');
+  transfer_glyph(writer, y.x - 5, y.y - 10, 'y');
+  transfer_glyph(writer, x.x - 5, x.y - 10, 'x');
+}
+
+//#define LINE_DRAWING 1
+
+static inline void render_quad(ta_parameter_writer& writer,
+                               uint32_t base_color,
+                               vec3 ap,
+                               vec3 bp,
+                               vec3 cp,
+                               vec3 dp)
+{
+#ifdef LINE_DRAWING
+  transfer_line(writer, ap, bp, base_color);
+  transfer_line(writer, bp, cp, base_color);
+  transfer_line(writer, cp, dp, base_color);
+  transfer_line(writer, dp, ap, base_color);
+#else
+  writer.append<ta_vertex_parameter::polygon_type_0>() =
+    ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(false),
+                                        ap.x, ap.y, ap.z,
+                                        base_color);
+
+  writer.append<ta_vertex_parameter::polygon_type_0>() =
+    ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(false),
+                                        bp.x, bp.y, bp.z,
+                                        base_color);
+
+  writer.append<ta_vertex_parameter::polygon_type_0>() =
+    ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(false),
+                                        dp.x, dp.y, dp.z,
+                                        base_color);
+
+  writer.append<ta_vertex_parameter::polygon_type_0>() =
+    ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(true),
+                                        cp.x, cp.y, cp.z,
+                                        base_color);
+#endif
+}
+
+static inline void render_tri(ta_parameter_writer& writer,
+                              uint32_t base_color,
+                              vec3 ap,
+                              vec3 bp,
+                              vec3 cp)
+{
+#ifdef LINE_DRAWING
+  transfer_line(writer, ap, bp, base_color);
+  transfer_line(writer, bp, cp, base_color);
+  transfer_line(writer, cp, ap, base_color);
+#else
+#endif
+}
+
+static inline void render_last_tri_mod(ta_parameter_writer& writer)
+{
+#ifdef LINE_DRAWING
+#else
+  const uint32_t last_parameter_control_word = para_control::para_type::polygon_or_modifier_volume
+                                             | para_control::list_type::opaque_modifier_volume
+                                             | obj_control::volume::modifier_volume::last_in_volume;
+
+  const uint32_t last_isp_tsp_instruction_word = isp_tsp_instruction_word::volume_instruction::inside_last_polygon
+                                               | isp_tsp_instruction_word::culling_mode::no_culling;
+
+  writer.append<ta_global_parameter::modifier_volume>() =
+    ta_global_parameter::modifier_volume(last_parameter_control_word,
+                                         last_isp_tsp_instruction_word);
+#endif
+}
+
+static inline void render_tri_mod(ta_parameter_writer& writer,
+                                  vec3 ap,
+                                  vec3 bp,
+                                  vec3 cp)
+{
+#ifdef LINE_DRAWING
+  transfer_line(writer, ap, bp, base_color);
+  transfer_line(writer, bp, cp, base_color);
+  transfer_line(writer, cp, ap, base_color);
+#else
+  writer.append<ta_vertex_parameter::modifier_volume>() =
+    ta_vertex_parameter::modifier_volume(modifier_volume_vertex_parameter_control_word(),
+                                         ap.x, ap.y, ap.z,
+                                         bp.x, bp.y, bp.z,
+                                         cp.x, cp.y, cp.z);
+#endif
+}
+
+void set_edge_coloring(uint8_t * edge_coloring,
+                       const int edge_stride,
+                       bool l_dot_n_b, int a, int b)
+{
+  int ma = min(a, b);
+  int mb = max(a, b);
+
+  int bit = 1 << ((int)l_dot_n_b);
+
+  edge_coloring[ma * edge_stride + mb] |= bit;
+}
+
+struct edge {
+  int a;
+  int b;
+};
+
+static uint32_t random;
+
+uint32_t xorshift()
+{
+  uint32_t x = random;
+  x ^= x << 13;
+  x ^= x >> 17;
+  x ^= x << 5;
+  return random = x;
+}
+
+static inline void render_extension_mesh(ta_parameter_writer& writer,
+                                         vec3 ap,
+                                         vec3 bp,
+                                         vec3 cp,
+                                         vec3 dp,
+                                         vec3 ep,
+                                         vec3 fp,
+                                         vec3 apo,
+                                         vec3 bpo,
+                                         vec3 cpo,
+                                         vec3 dpo,
+                                         vec3 epo,
+                                         vec3 fpo)
+{
+  render_tri_mod(writer, ap, bp, apo);
+  render_tri_mod(writer, bpo, apo, bp);
+
+  render_tri_mod(writer, bp, cp, bpo);
+  render_tri_mod(writer, cpo, bpo, cp);
+
+  render_tri_mod(writer, cp, dp, cpo);
+  render_tri_mod(writer, dpo, cpo, dp);
+
+  render_tri_mod(writer, dp, ep, dpo);
+  render_tri_mod(writer, epo, dpo, ep);
+
+  render_tri_mod(writer, ep, fp, epo);
+  render_tri_mod(writer, fpo, epo, fp);
+
+  render_tri_mod(writer, fp, ap, fpo);
+  render_last_tri_mod(writer);
+  render_tri_mod(writer, apo, fpo, ap);
+
+  /*
+  random = 0x12345789;
+
+  render_quad(writer, xorshift(), ap, bp, bpo, apo);
+
+  render_quad(writer, xorshift(), bp, cp, cpo, bpo);
+
+  render_quad(writer, xorshift(), cp, dp, dpo, cpo);
+
+  render_quad(writer, xorshift(), dp, ep, epo, dpo);
+
+  render_quad(writer, xorshift(), ep, fp, fpo, epo);
+
+  render_quad(writer, xorshift(), fp, ap, apo, fpo);
+  */
+}
+
+void render_silhouette(ta_parameter_writer& writer,
+                       const mat4x4& screen,
+                       const mat4x4& model,
+                       const vec3 light_vec,
+                       const uint8_t * edge_coloring,
+                       const int edge_stride)
+{
+  struct edge silhouette[6];
+  int ix = 0;
+
+  for (int a = 0; a < edge_stride; a++) {
+    for (int b = 0; b < edge_stride; b++) {
+      uint8_t coloring = edge_coloring[a * edge_stride + b];
+      if (coloring == 0b11) {
+        silhouette[ix++] = {a, b};
+      }
+    }
+  }
+  assert(ix == 6);
+
+  int last_ix = 0;
+  int order_ix = 0;
+  int order_vtx[6];
+  order_vtx[order_ix++] = silhouette[0].a;
+
+  // calculate vertex ordering
+  while (order_ix < 6) {
+    for (int i = 1; i < 6; i++) {
+      if (i == last_ix)
+        continue;
+
+      int last_vtx = order_vtx[order_ix - 1];
+      if (last_vtx == silhouette[i].a) {
+        last_ix = i;
+        order_vtx[order_ix++] = silhouette[i].b;
+        break;
+      }
+      if (last_vtx == silhouette[i].b) {
+        last_ix = i;
+        order_vtx[order_ix++] = silhouette[i].a;
+        break;
+      }
+    }
+  }
+
+  const vec3 * position = cube_position;
+
+  vec3 ap = screen_transform(screen, model * position[order_vtx[0]]);
+  vec3 bp = screen_transform(screen, model * position[order_vtx[1]]);
+  vec3 cp = screen_transform(screen, model * position[order_vtx[2]]);
+  vec3 dp = screen_transform(screen, model * position[order_vtx[3]]);
+  vec3 ep = screen_transform(screen, model * position[order_vtx[4]]);
+  vec3 fp = screen_transform(screen, model * position[order_vtx[5]]);
+
+  float scale = 5;
+  mat4x4 translate = {
+    1, 0, 0, -light_vec.x * scale,
+    0, 1, 0, -light_vec.y * scale,
+    0, 0, 1, -light_vec.z * scale,
+    0, 0, 0, 1,
+  };
+
+  mat4x4 model2 = model * translate;
+
+  vec3 apo = screen_transform(screen, model2 * position[order_vtx[0]]);
+  vec3 bpo = screen_transform(screen, model2 * position[order_vtx[1]]);
+  vec3 cpo = screen_transform(screen, model2 * position[order_vtx[2]]);
+  vec3 dpo = screen_transform(screen, model2 * position[order_vtx[3]]);
+  vec3 epo = screen_transform(screen, model2 * position[order_vtx[4]]);
+  vec3 fpo = screen_transform(screen, model2 * position[order_vtx[5]]);
+
+  if (0) { // perimeter
+    uint32_t base_color = 0xff0080;
+
+    transfer_line(writer, ap, bp, base_color);
+    transfer_line(writer, bp, cp, base_color);
+    transfer_line(writer, cp, dp, base_color);
+    transfer_line(writer, dp, ep, base_color);
+    transfer_line(writer, ep, fp, base_color);
+    transfer_line(writer, fp, ap, base_color);
+  }
+
+  if (1) { // near end cap
+    render_tri_mod(writer, ap, bp, cp);
+    render_tri_mod(writer, cp, dp, ep);
+    render_tri_mod(writer, ep, fp, ap);
+    render_tri_mod(writer, ap, cp, ep);
+  }
+
+  if (1) { // far end cap
+    render_tri_mod(writer, apo, bpo, cpo);
+    render_tri_mod(writer, cpo, dpo, epo);
+    render_tri_mod(writer, epo, fpo, apo);
+    render_tri_mod(writer, apo, cpo, epo);
+  }
+
+  if (1) {
+    render_extension_mesh(writer,
+                          ap,
+                          bp,
+                          cp,
+                          dp,
+                          ep,
+                          fp,
+                          apo,
+                          bpo,
+                          cpo,
+                          dpo,
+                          epo,
+                          fpo);
+  }
+}
+
+void render_cube(ta_parameter_writer& writer,
+                 const mat4x4& screen,
+                 const mat4x4& model,
+                 const vec3 light_vec)
+{
+  const vec3 * normal = cube_normal;
+  const vec3 * position = cube_position;
+  const union quadrilateral * quadrilateral = cube_Cube_quadrilateral;
+
+  const int edge_stride = 8;
+  const int edge_coloring_length = edge_stride * edge_stride;
+  uint8_t __attribute__((aligned(4))) edge_coloring[edge_coloring_length];
+  for (int i = 0; i < edge_coloring_length / 4; i++)
+    reinterpret_cast<uint32_t *>(edge_coloring)[i] = 0;
+
+  global_polygon_type_0(writer, false); // no self-shadow
+
+  for (int i = 0; i < 6; i++) {
+    const union quadrilateral& q = quadrilateral[i];
+    vec3 n3 = normal[q.a.normal];
+    vec4 n4 = model * (vec4){n3.x, n3.y, n3.z, 0.f}; // no translation component
+    vec3 n = {n4.x, n4.y, n4.z};
+    float l_dot_n = dot(light_vec, n);
+    bool l_dot_n_b = l_dot_n > 0;
+
+    set_edge_coloring(edge_coloring, edge_stride, l_dot_n_b, q.a.position, q.b.position);
+    set_edge_coloring(edge_coloring, edge_stride, l_dot_n_b, q.b.position, q.c.position);
+    set_edge_coloring(edge_coloring, edge_stride, l_dot_n_b, q.c.position, q.d.position);
+    set_edge_coloring(edge_coloring, edge_stride, l_dot_n_b, q.d.position, q.a.position);
+
+    vec3 ap = model * position[q.a.position];
+    vec3 bp = model * position[q.b.position];
+    vec3 cp = model * position[q.c.position];
+    vec3 dp = model * position[q.d.position];
+
+    uint32_t base_color = l_dot_n_b ? 0xff8000 : 0x0080ff;
+
+    vec3 sap = screen_transform(screen, ap);
+    vec3 sbp = screen_transform(screen, bp);
+    vec3 scp = screen_transform(screen, cp);
+    vec3 sdp = screen_transform(screen, dp);
+
+    render_quad(writer,
+                base_color,
+                sap,
+                sbp,
+                scp,
+                sdp);
+  }
+
+  if (1) {
+    // end of opaque list
+    writer.append<ta_global_parameter::end_of_list>() =
+      ta_global_parameter::end_of_list(para_control::para_type::end_of_list);
+
+    global_modifier_volume(writer);
+
+    render_silhouette(writer,
+                      screen,
+                      model,
+                      light_vec,
+                      edge_coloring,
+                      edge_stride);
+  }
+}
+
+void render_plane(ta_parameter_writer& writer,
+                  const mat4x4& screen,
+                  const vec3 light_vec)
+{
+  //const vec3 * normal = plane_normal;
+  const vec3 * position = plane_position;
+  const union quadrilateral * quadrilateral = plane_Plane.quadrilateral;
+  int count = plane_Plane.quadrilateral_count;
+
+  float scale = 3;
+  const mat4x4 model = {
+    scale, 0, 0, 0,
+    0, scale, 0, 0,
+    0, 0, scale, 1,
+    0, 0, 0, 1,
+  };
+
+  global_polygon_type_0(writer, true); // with shadow
+
+  for (int i = 0; i < count; i++) {
+    const union quadrilateral& q = quadrilateral[i];
+
+    vec3 ap = model * position[q.a.position];
+    vec3 bp = model * position[q.b.position];
+    vec3 cp = model * position[q.c.position];
+    vec3 dp = model * position[q.d.position];
+
+    uint32_t base_color = 0xffff80;
+
+    vec3 sap = screen_transform(screen, ap);
+    vec3 sbp = screen_transform(screen, bp);
+    vec3 scp = screen_transform(screen, cp);
+    vec3 sdp = screen_transform(screen, dp);
+
+    render_quad(writer,
+                base_color,
+                sap,
+                sbp,
+                scp,
+                sdp);
+  }
+}
+
+constexpr inline mat4x4 screen_rotation()
+{
+  float zt = -0.7853981633974483 / 1.5;
+  float xt = -0.7853981633974483 * 1;
+  mat4x4 rx = {
+    1, 0, 0, 0,
+    0, cos(xt), -sin(xt), 0,
+    0, sin(xt), cos(xt), 0,
+    0, 0, 0, 1,
+  };
+
+  mat4x4 rz = {
+    cos(zt), -sin(zt), 0, 0,
+    sin(zt), cos(zt), 0, 0,
+    0, 0, 1, 0,
+    0, 0, 0, 1,
+  };
+
+  mat4x4 t = {
+    1, 0, 0, 0,
+    0, 1, 0, 0,
+    0, 0, 1, 2.5,
+    0, 0, 0, 1,
+  };
+
+  return t * rx * rz;
+}
+
+void render_light_vec(ta_parameter_writer& writer, const mat4x4& screen, vec3 l)
+{
+  vec3 a = screen_transform(screen, {0, 0, 0});
+  vec3 b = screen_transform(screen, l * 0.5f);
+
+  transfer_line(writer, a, b, 0x00ff00);
+}
+
+void transfer_scene(ta_parameter_writer& writer, const mat4x4& screen, vec3 light_vec)
+{
+  // opaque
+  render_basis(writer, screen);
+
+  render_light_vec(writer, screen, light_vec);
+
+  if (1) {
+    render_plane(writer,
+                 screen,
+                 light_vec);
+  }
+
+  const mat4x4 model = mat4x4() * 0.3f;
+  render_cube(writer,
+              screen,
+              model,
+              light_vec);
+
+  writer.append<ta_global_parameter::end_of_list>() =
+    ta_global_parameter::end_of_list(para_control::para_type::end_of_list);
+
+  // punch_through
+  /*
+  render_basis_text(writer, screen);
+
+  writer.append<ta_global_parameter::end_of_list>() =
+    ta_global_parameter::end_of_list(para_control::para_type::end_of_list);
+  */
+}
+
+vec3 update_light()
+{
+  static float ltheta = 2;
+
+  vec3 light_origin = {0, 0, 0};
+  vec3 light_pos = {1, 1, 2};
+
+  mat3x3 rot = {
+    cos(ltheta), -sin(ltheta), 0,
+    sin(ltheta), cos(ltheta), 0,
+    0, 0, 1,
+  };
+
+  light_pos = rot * light_pos;
+  ltheta += deg / 8;
+
+  vec3 light_vec = light_origin - light_pos;
+
+  return light_vec;
+}
+
+void transfer_ta_fifo_texture_memory_32byte(void * dst, void * src, int length)
+{
+  uint32_t out_addr = (uint32_t)dst;
+  sh7091.CCN.QACR0 = ((reinterpret_cast<uint32_t>(out_addr) >> 24) & 0b11100);
+  sh7091.CCN.QACR1 = ((reinterpret_cast<uint32_t>(out_addr) >> 24) & 0b11100);
+
+  volatile uint32_t * base = &store_queue[(out_addr & 0x03ffffc0) / 4];
+  uint32_t * src32 = reinterpret_cast<uint32_t *>(src);
+
+  length = (length + 31) & ~31; // round up to nearest multiple of 32
+  while (length > 0) {
+    base[0] = src32[0];
+    base[1] = src32[1];
+    base[2] = src32[2];
+    base[3] = src32[3];
+    base[4] = src32[4];
+    base[5] = src32[5];
+    base[6] = src32[6];
+    base[7] = src32[7];
+    asm volatile ("pref @%0"
+                  :                // output
+                  : "r" (&base[0]) // input
+                  : "memory");
+    length -= 32;
+    base += 8;
+    src32 += 8;
+  }
+}
+
+void transfer_textures()
+{
+  system.LMMODE0 = 0; // 64-bit address space
+  system.LMMODE1 = 0; // 64-bit address space
+
+  uint32_t offset = texture_memory_alloc.texture.start;
+  void * dst = reinterpret_cast<void *>(&ta_fifo_texture_memory[offset / 4]);
+  void * src = reinterpret_cast<void *>(&_binary_font_terminus_ter_u32n_data_start);
+  uint32_t size = reinterpret_cast<uint32_t>(&_binary_font_terminus_ter_u32n_data_size);
+  transfer_ta_fifo_texture_memory_32byte(dst, src, size);
+}
+
+static inline uint16_t argb1555(int a, int r, int g, int b)
+{
+  return ((a & 1) << 15) | ((r & 31) << 10) | ((g & 31) << 5) | ((b & 31) << 0);
+}
+
+void transfer_palette()
+{
+  holly.PAL_RAM_CTRL = pal_ram_ctrl::pixel_format::argb1555;
+
+  holly.PALETTE_RAM[  0 + 0] = argb1555(0,  0,  0,  0);
+  holly.PALETTE_RAM[  0 + 1] = argb1555(1, 31, 31, 31);
+}
+
+uint8_t __attribute__((aligned(32))) ta_parameter_buf[1024 * 1024];
+
+void main()
+{
+  serial::init(0);
+  transfer_textures();
+  transfer_palette();
+
+  constexpr uint32_t ta_alloc = 0
+    //ta_alloc_ctrl::pt_opb::_16x4byte
+			      | ta_alloc_ctrl::tm_opb::no_list
+                              | ta_alloc_ctrl::t_opb::no_list
+                              | ta_alloc_ctrl::om_opb::_16x4byte
+                              | ta_alloc_ctrl::o_opb::_16x4byte;
+
+  constexpr int render_passes = 1;
+  constexpr struct opb_size opb_size[render_passes] = {
+    {
+      .opaque = 16 * 4,
+      .opaque_modifier = 16 * 4,
+      .translucent = 0,
+      .translucent_modifier = 0,
+      //.punch_through = 16 * 4
+    }
+  };
+
+  holly.SOFTRESET = softreset::pipeline_soft_reset
+		  | softreset::ta_soft_reset;
+  holly.SOFTRESET = 0;
+
+  core_init();
+  holly.FPU_SHAD_SCALE = fpu_shad_scale::simple_shadow_enable::intensity_volume_mode;
+  video_output::set_mode_vga();
+
+  const int framebuffer_width = 640;
+  const int framebuffer_height = 480;
+  const int tile_width = framebuffer_width / 32;
+  const int tile_height = framebuffer_height / 32;
+
+  for (int i = 0; i < 2; i++) {
+    region_array_multipass(tile_width,
+                           tile_height,
+                           opb_size,
+                           render_passes,
+                           texture_memory_alloc.region_array[i].start,
+                           texture_memory_alloc.object_list[i].start);
+
+    background_parameter2(texture_memory_alloc.background[i].start,
+                          0xff202040);
+  }
+
+  ta_parameter_writer writer = ta_parameter_writer(ta_parameter_buf);
+
+  int ta = 0;
+  int core = 0;
+
+  const float degree = 0.017453292519943295 / 5;
+  float theta = 0;
+
+  const mat4x4 screen = screen_rotation();
+
+  while (1) {
+    vec3 light_vec = update_light();
+
+    ta_polygon_converter_init2(texture_memory_alloc.isp_tsp_parameters[ta].start,
+			       texture_memory_alloc.isp_tsp_parameters[ta].end,
+			       texture_memory_alloc.object_list[ta].start,
+			       texture_memory_alloc.object_list[ta].end,
+			       opb_size[0].total(),
+			       ta_alloc,
+			       tile_width,
+			       tile_height);
+    writer.offset = 0;
+    transfer_scene(writer, screen, light_vec);
+    ta_polygon_converter_writeback(writer.buf, writer.offset);
+    ta_polygon_converter_transfer(writer.buf, writer.offset);
+    ta_wait_opaque_modifier_volume_list();
+
+    core_start_render2(texture_memory_alloc.region_array[core].start,
+                       texture_memory_alloc.isp_tsp_parameters[core].start,
+                       texture_memory_alloc.background[core].start,
+                       texture_memory_alloc.framebuffer[core].start,
+                       framebuffer_width);
+    core_wait_end_of_render_video();
+
+    holly.FB_R_SOF1 = texture_memory_alloc.framebuffer[ta].start;
+
+    theta += degree;
+  }
+}
diff --git a/font/terminus/ter_u32n.data b/font/terminus/ter_u32n.data
new file mode 100644
index 0000000..869cd01
Binary files /dev/null and b/font/terminus/ter_u32n.data differ
diff --git a/font/terminus/ter_u32n.data.h b/font/terminus/ter_u32n.data.h
new file mode 100644
index 0000000..ef3d461
--- /dev/null
+++ b/font/terminus/ter_u32n.data.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern uint32_t _binary_font_terminus_ter_u32n_data_start __asm("_binary_font_terminus_ter_u32n_data_start");
+extern uint32_t _binary_font_terminus_ter_u32n_data_end __asm("_binary_font_terminus_ter_u32n_data_end");
+extern uint32_t _binary_font_terminus_ter_u32n_data_size __asm("_binary_font_terminus_ter_u32n_data_size");
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/math/mat4x4.hpp b/math/mat4x4.hpp
index ca8a989..4fa3eca 100644
--- a/math/mat4x4.hpp
+++ b/math/mat4x4.hpp
@@ -80,6 +80,18 @@ mat<4, 4, T>::operator[](int i) const
   }
 }
 
+template<typename T>
+inline constexpr mat<4, 4, T> operator+(mat<4, 4, T> const& m1, mat<4, 4, T> const& m2)
+{
+#define c(i, j) ( m1[i][j] + m2[i][j] )
+
+  return mat<4, 4, T>(c(0,0), c(0,1), c(0,2), c(0,3),
+                      c(1,0), c(1,1), c(1,2), c(1,3),
+                      c(2,0), c(2,1), c(2,2), c(2,3),
+                      c(3,0), c(3,1), c(3,2), c(3,3));
+#undef c
+}
+
 template<typename T>
 inline constexpr mat<4, 4, T> operator*(mat<4, 4, T> const& m1, mat<4, 4, T> const& m2)
 {
@@ -96,6 +108,18 @@ inline constexpr mat<4, 4, T> operator*(mat<4, 4, T> const& m1, mat<4, 4, T> con
 #undef c
 }
 
+template<typename T>
+inline constexpr mat<4, 4, T> operator*(mat<4, 4, T> const& m1, float s)
+{
+#define c(i, j) ( m1[i][j] * s )
+
+  return mat<4, 4, T>(c(0,0), c(0,1), c(0,2), c(0,3),
+                      c(1,0), c(1,1), c(1,2), c(1,3),
+                      c(2,0), c(2,1), c(2,2), c(2,3),
+                      c(3,0), c(3,1), c(3,2), c(3,3));
+#undef c
+}
+
 template<typename T>
 inline constexpr typename mat<4, 4, T>::row_type operator*
 (
@@ -113,6 +137,23 @@ inline constexpr typename mat<4, 4, T>::row_type operator*
 #undef c
 }
 
+template<typename T>
+inline constexpr vec<3, T> operator*
+(
+  mat<4, 4, T> const& m,
+  vec<3, T> const& v
+)
+{
+#define c(i) (                                  \
+    m[i][0] * v[0]                              \
+  + m[i][1] * v[1]                              \
+  + m[i][2] * v[2]                              \
+  + m[i][3] )
+
+  return vec<3, T>(c(0), c(1), c(2));
+#undef c
+}
+
 template<typename T>
 inline constexpr mat<4, 4, T> transpose(mat<4, 4, T> const& m)
 {
diff --git a/model/cube/model.h b/model/cube/model.h
new file mode 100644
index 0000000..de44714
--- /dev/null
+++ b/model/cube/model.h
@@ -0,0 +1,104 @@
+#pragma once
+
+#include <stddef.h>
+
+#include "model.h"
+
+// floating-point
+const vertex_position cube_position[] = {
+  {1.0, 1.0, -1.0},
+  {1.0, -1.0, -1.0},
+  {1.0, 1.0, 1.0},
+  {1.0, -1.0, 1.0},
+  {-1.0, 1.0, -1.0},
+  {-1.0, -1.0, -1.0},
+  {-1.0, 1.0, 1.0},
+  {-1.0, -1.0, 1.0},
+};
+
+// floating-point
+const vertex_texture cube_texture[] = {
+  {0.625, 0.5},
+  {0.875, 0.5},
+  {0.875, 0.75},
+  {0.625, 0.75},
+  {0.375, 0.75},
+  {0.625, 1.0},
+  {0.375, 1.0},
+  {0.375, 0.0},
+  {0.625, 0.0},
+  {0.625, 0.25},
+  {0.375, 0.25},
+  {0.125, 0.5},
+  {0.375, 0.5},
+  {0.125, 0.75},
+};
+
+// floating-point
+const vertex_normal cube_normal[] = {
+  {0.0, 1.0, 0.0},
+  {0.0, 0.0, 1.0},
+  {-1.0, 0.0, 0.0},
+  {0.0, -1.0, 0.0},
+  {1.0, 0.0, 0.0},
+  {0.0, 0.0, -1.0},
+};
+
+const union quadrilateral cube_Cube_quadrilateral[] = {
+  { .v = {
+    {0, 0, 0},
+    {4, 1, 0},
+    {6, 2, 0},
+    {2, 3, 0},
+  }},
+  { .v = {
+    {3, 4, 1},
+    {2, 3, 1},
+    {6, 5, 1},
+    {7, 6, 1},
+  }},
+  { .v = {
+    {7, 7, 2},
+    {6, 8, 2},
+    {4, 9, 2},
+    {5, 10, 2},
+  }},
+  { .v = {
+    {5, 11, 3},
+    {1, 12, 3},
+    {3, 4, 3},
+    {7, 13, 3},
+  }},
+  { .v = {
+    {1, 12, 4},
+    {0, 0, 4},
+    {2, 3, 4},
+    {3, 4, 4},
+  }},
+  { .v = {
+    {5, 10, 5},
+    {4, 9, 5},
+    {0, 0, 5},
+    {1, 12, 5},
+  }},
+};
+
+const struct object cube_Cube = {
+  .triangle = NULL,
+  .quadrilateral = &cube_Cube_quadrilateral[0],
+  .triangle_count = 0,
+  .quadrilateral_count = 6,
+  .material = -1,
+};
+
+const struct object * cube_object_list[] = {
+  &cube_Cube,
+};
+
+const struct model cube_model = {
+  .position = &cube_position[0],
+  .texture = &cube_texture[0],
+  .normal = &cube_normal[0],
+  .object = &cube_object_list[0],
+  .object_count = 1,
+};
diff --git a/model/plane/model.h b/model/plane/model.h
new file mode 100644
index 0000000..e56df6a
--- /dev/null
+++ b/model/plane/model.h
@@ -0,0 +1,2411 @@
+#pragma once
+
+#include <stddef.h>
+
+#include "../model.h"
+
+// floating-point
+vertex_position plane_position[] = {
+  {-1.0, 1.0, 0.5},
+  {-1.0, -1.0, 0.5},
+  {1.0, 1.0, 0.5},
+  {1.0, -1.0, 0.5},
+  {0.875, 1.0, 0.572594},
+  {0.75, 1.0, 0.562882},
+  {0.625, 1.0, 0.573245},
+  {0.5, 1.0, 0.570143},
+  {0.375, 1.0, 0.533738},
+  {0.25, 1.0, 0.521783},
+  {0.125, 1.0, 0.483391},
+  {0.0, 1.0, 0.5},
+  {-0.125, 1.0, 0.5275},
+  {-0.25, 1.0, 0.513289},
+  {-0.375, 1.0, 0.462632},
+  {-0.5, 1.0, 0.429857},
+  {-0.625, 1.0, 0.430386},
+  {-0.75, 1.0, 0.402047},
+  {-0.875, 1.0, 0.416515},
+  {-1.0, 0.875, 0.467632},
+  {-1.0, 0.75, 0.443146},
+  {-1.0, 0.625, 0.455371},
+  {-1.0, 0.5, 0.429857},
+  {-1.0, 0.375, 0.448538},
+  {-1.0, 0.25, 0.507261},
+  {-1.0, 0.125, 0.52536},
+  {-1.0, 0.0, 0.5},
+  {-1.0, -0.125, 0.489473},
+  {-1.0, -0.25, 0.549593},
+  {-1.0, -0.375, 0.631163},
+  {-1.0, -0.5, 0.640286},
+  {-1.0, -0.625, 0.600338},
+  {-1.0, -0.75, 0.619736},
+  {-1.0, -0.875, 0.56989},
+  {-0.875, -1.0, 0.493045},
+  {-0.75, -1.0, 0.478217},
+  {-0.625, -1.0, 0.489826},
+  {-0.5, -1.0, 0.429857},
+  {-0.375, -1.0, 0.36812},
+  {-0.25, -1.0, 0.437118},
+  {-0.125, -1.0, 0.503577},
+  {0.0, -1.0, 0.5},
+  {0.125, -1.0, 0.496117},
+  {0.25, -1.0, 0.514522},
+  {0.375, -1.0, 0.582186},
+  {0.5, -1.0, 0.640286},
+  {0.625, -1.0, 0.645068},
+  {0.75, -1.0, 0.584665},
+  {0.875, -1.0, 0.500364},
+  {1.0, -0.875, 0.511765},
+  {1.0, -0.75, 0.529044},
+  {1.0, -0.625, 0.531869},
+  {1.0, -0.5, 0.5},
+  {1.0, -0.375, 0.468131},
+  {1.0, -0.25, 0.470956},
+  {1.0, -0.125, 0.488235},
+  {1.0, 0.0, 0.5},
+  {1.0, 0.125, 0.514468},
+  {1.0, 0.25, 0.472189},
+  {1.0, 0.375, 0.434633},
+  {1.0, 0.5, 0.429857},
+  {1.0, 0.625, 0.405778},
+  {1.0, 0.75, 0.443146},
+  {1.0, 0.875, 0.49969},
+  {-0.875, 0.875, 0.41664},
+  {-0.875, 0.75, 0.39167},
+  {-0.875, 0.625, 0.371579},
+  {-0.875, 0.5, 0.361486},
+  {-0.875, 0.375, 0.393825},
+  {-0.875, 0.25, 0.451033},
+  {-0.875, 0.125, 0.475818},
+  {-0.875, 0.0, 0.458541},
+  {-0.875, -0.125, 0.46091},
+  {-0.875, -0.25, 0.525519},
+  {-0.875, -0.375, 0.5846},
+  {-0.875, -0.5, 0.581568},
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+  {-0.1259945017199148, 0.10779529591592713, 0.9861569650490475},
+  {-0.24440688992734194, 0.23990676306697764, 0.9395264856249499},
+  {-0.21449123821187493, 0.2091914547036095, 0.9540610274030297},
+  {-0.3246918730641245, 0.12609684383549769, 0.9373765377588862},
+  {-0.4650006184512338, -0.09950013233526402, 0.8797011700033341},
+  {-0.3757069562786938, -0.2092038734455756, 0.9028167158062411},
+  {-0.31499613502113477, -0.05849928221821075, 0.9472883768429238},
+  {-0.30330593120547766, 0.25900506489356645, 0.9170179324610056},
+  {-0.22730890841068432, 0.2513098490259788, 0.9408368721195416},
+  {-0.24650796603363564, 0.08240266288507739, 0.9656312048765865},
+  {-0.18588978099017736, 0.0782956958124308, 0.9794461564275349},
+  {0.017799878872236413, -0.3673974998685201, 0.9298936720950921},
+  {0.18119626014778545, -0.47199025822160445, 0.8627821923593227},
+  {0.40160382931076877, -0.12740121477637437, 0.9069086474151797},
+  {0.029998950055121782, -0.1677941273083145, 0.9853655128105668},
+  {0.16780149931309457, 0.024800221590969878, 0.9855088055605168},
+  {0.11440456426113861, 0.24660983869577607, 0.9623383932560636},
+  {-0.15739954590296512, 0.4500987014671194, 0.8789974640959741},
+  {-0.24199510569848032, 0.3957919951878451, 0.8858820832160484},
+  {-0.32968967757779, 0.20179368193872618, 0.9222711241431475},
+  {0.0722964886448177, 0.10769476939207284, 0.9915518414965593},
+  {0.23450313884552032, 0.06830091421385517, 0.9697129796951005},
+  {-0.035598705298632, 0.16729391563093074, 0.9852641665938796},
+  {-0.34181478551832833, 0.2495107928227704, 0.9060391915728656},
+  {-0.2717055686626952, 0.25340519359266456, 0.9284190281429746},
+  {-0.07020064093477763, 0.16430150007954364, 0.9839089831300242},
+  {-0.14150560019494376, 0.1688066806565831, 0.97543860374663},
+  {-0.010999643342346842, 0.12679588870996178, 0.9918678392067121},
+};
+
+const union quadrilateral plane_Plane_quadrilateral[] = {
+  { .v = {
+    {64, 0, 0},
+    {65, 1, 0},
+    {80, 2, 0},
+    {79, 3, 0},
+  }},
+  { .v = {
+    {65, 1, 1},
+    {66, 4, 1},
+    {81, 5, 1},
+    {80, 2, 1},
+  }},
+  { .v = {
+    {66, 4, 2},
+    {67, 6, 2},
+    {82, 7, 2},
+    {81, 5, 2},
+  }},
+  { .v = {
+    {67, 6, 3},
+    {68, 8, 3},
+    {83, 9, 3},
+    {82, 7, 3},
+  }},
+  { .v = {
+    {68, 8, 4},
+    {69, 10, 4},
+    {84, 11, 4},
+    {83, 9, 4},
+  }},
+  { .v = {
+    {69, 10, 5},
+    {70, 12, 5},
+    {85, 13, 5},
+    {84, 11, 5},
+  }},
+  { .v = {
+    {70, 12, 6},
+    {71, 14, 6},
+    {86, 15, 6},
+    {85, 13, 6},
+  }},
+  { .v = {
+    {71, 14, 7},
+    {72, 16, 7},
+    {87, 17, 7},
+    {86, 15, 7},
+  }},
+  { .v = {
+    {72, 16, 8},
+    {73, 18, 8},
+    {88, 19, 8},
+    {87, 17, 8},
+  }},
+  { .v = {
+    {73, 18, 9},
+    {74, 20, 9},
+    {89, 21, 9},
+    {88, 19, 9},
+  }},
+  { .v = {
+    {74, 20, 10},
+    {75, 22, 10},
+    {90, 23, 10},
+    {89, 21, 10},
+  }},
+  { .v = {
+    {75, 22, 11},
+    {76, 24, 11},
+    {91, 25, 11},
+    {90, 23, 11},
+  }},
+  { .v = {
+    {76, 24, 12},
+    {77, 26, 12},
+    {92, 27, 12},
+    {91, 25, 12},
+  }},
+  { .v = {
+    {77, 26, 13},
+    {78, 28, 13},
+    {93, 29, 13},
+    {92, 27, 13},
+  }},
+  { .v = {
+    {79, 3, 14},
+    {80, 2, 14},
+    {95, 30, 14},
+    {94, 31, 14},
+  }},
+  { .v = {
+    {80, 2, 15},
+    {81, 5, 15},
+    {96, 32, 15},
+    {95, 30, 15},
+  }},
+  { .v = {
+    {81, 5, 16},
+    {82, 7, 16},
+    {97, 33, 16},
+    {96, 32, 16},
+  }},
+  { .v = {
+    {82, 7, 17},
+    {83, 9, 17},
+    {98, 34, 17},
+    {97, 33, 17},
+  }},
+  { .v = {
+    {83, 9, 18},
+    {84, 11, 18},
+    {99, 35, 18},
+    {98, 34, 18},
+  }},
+  { .v = {
+    {84, 11, 19},
+    {85, 13, 19},
+    {100, 36, 19},
+    {99, 35, 19},
+  }},
+  { .v = {
+    {85, 13, 20},
+    {86, 15, 20},
+    {101, 37, 20},
+    {100, 36, 20},
+  }},
+  { .v = {
+    {86, 15, 21},
+    {87, 17, 21},
+    {102, 38, 21},
+    {101, 37, 21},
+  }},
+  { .v = {
+    {87, 17, 22},
+    {88, 19, 22},
+    {103, 39, 22},
+    {102, 38, 22},
+  }},
+  { .v = {
+    {88, 19, 23},
+    {89, 21, 23},
+    {104, 40, 23},
+    {103, 39, 23},
+  }},
+  { .v = {
+    {89, 21, 24},
+    {90, 23, 24},
+    {105, 41, 24},
+    {104, 40, 24},
+  }},
+  { .v = {
+    {90, 23, 25},
+    {91, 25, 25},
+    {106, 42, 25},
+    {105, 41, 25},
+  }},
+  { .v = {
+    {91, 25, 26},
+    {92, 27, 26},
+    {107, 43, 26},
+    {106, 42, 26},
+  }},
+  { .v = {
+    {92, 27, 27},
+    {93, 29, 27},
+    {108, 44, 27},
+    {107, 43, 27},
+  }},
+  { .v = {
+    {94, 31, 28},
+    {95, 30, 28},
+    {110, 45, 28},
+    {109, 46, 28},
+  }},
+  { .v = {
+    {95, 30, 29},
+    {96, 32, 29},
+    {111, 47, 29},
+    {110, 45, 29},
+  }},
+  { .v = {
+    {96, 32, 30},
+    {97, 33, 30},
+    {112, 48, 30},
+    {111, 47, 30},
+  }},
+  { .v = {
+    {97, 33, 31},
+    {98, 34, 31},
+    {113, 49, 31},
+    {112, 48, 31},
+  }},
+  { .v = {
+    {98, 34, 32},
+    {99, 35, 32},
+    {114, 50, 32},
+    {113, 49, 32},
+  }},
+  { .v = {
+    {99, 35, 33},
+    {100, 36, 33},
+    {115, 51, 33},
+    {114, 50, 33},
+  }},
+  { .v = {
+    {100, 36, 34},
+    {101, 37, 34},
+    {116, 52, 34},
+    {115, 51, 34},
+  }},
+  { .v = {
+    {101, 37, 35},
+    {102, 38, 35},
+    {117, 53, 35},
+    {116, 52, 35},
+  }},
+  { .v = {
+    {102, 38, 36},
+    {103, 39, 36},
+    {118, 54, 36},
+    {117, 53, 36},
+  }},
+  { .v = {
+    {103, 39, 37},
+    {104, 40, 37},
+    {119, 55, 37},
+    {118, 54, 37},
+  }},
+  { .v = {
+    {104, 40, 38},
+    {105, 41, 38},
+    {120, 56, 38},
+    {119, 55, 38},
+  }},
+  { .v = {
+    {105, 41, 39},
+    {106, 42, 39},
+    {121, 57, 39},
+    {120, 56, 39},
+  }},
+  { .v = {
+    {106, 42, 40},
+    {107, 43, 40},
+    {122, 58, 40},
+    {121, 57, 40},
+  }},
+  { .v = {
+    {107, 43, 41},
+    {108, 44, 41},
+    {123, 59, 41},
+    {122, 58, 41},
+  }},
+  { .v = {
+    {109, 46, 42},
+    {110, 45, 42},
+    {125, 60, 42},
+    {124, 61, 42},
+  }},
+  { .v = {
+    {110, 45, 43},
+    {111, 47, 43},
+    {126, 62, 43},
+    {125, 60, 43},
+  }},
+  { .v = {
+    {111, 47, 44},
+    {112, 48, 44},
+    {127, 63, 44},
+    {126, 62, 44},
+  }},
+  { .v = {
+    {112, 48, 45},
+    {113, 49, 45},
+    {128, 64, 45},
+    {127, 63, 45},
+  }},
+  { .v = {
+    {113, 49, 46},
+    {114, 50, 46},
+    {129, 65, 46},
+    {128, 64, 46},
+  }},
+  { .v = {
+    {114, 50, 47},
+    {115, 51, 47},
+    {130, 66, 47},
+    {129, 65, 47},
+  }},
+  { .v = {
+    {115, 51, 48},
+    {116, 52, 48},
+    {131, 67, 48},
+    {130, 66, 48},
+  }},
+  { .v = {
+    {116, 52, 49},
+    {117, 53, 49},
+    {132, 68, 49},
+    {131, 67, 49},
+  }},
+  { .v = {
+    {117, 53, 50},
+    {118, 54, 50},
+    {133, 69, 50},
+    {132, 68, 50},
+  }},
+  { .v = {
+    {118, 54, 51},
+    {119, 55, 51},
+    {134, 70, 51},
+    {133, 69, 51},
+  }},
+  { .v = {
+    {119, 55, 52},
+    {120, 56, 52},
+    {135, 71, 52},
+    {134, 70, 52},
+  }},
+  { .v = {
+    {120, 56, 53},
+    {121, 57, 53},
+    {136, 72, 53},
+    {135, 71, 53},
+  }},
+  { .v = {
+    {121, 57, 54},
+    {122, 58, 54},
+    {137, 73, 54},
+    {136, 72, 54},
+  }},
+  { .v = {
+    {122, 58, 55},
+    {123, 59, 55},
+    {138, 74, 55},
+    {137, 73, 55},
+  }},
+  { .v = {
+    {124, 61, 56},
+    {125, 60, 56},
+    {140, 75, 56},
+    {139, 76, 56},
+  }},
+  { .v = {
+    {125, 60, 57},
+    {126, 62, 57},
+    {141, 77, 57},
+    {140, 75, 57},
+  }},
+  { .v = {
+    {126, 62, 58},
+    {127, 63, 58},
+    {142, 78, 58},
+    {141, 77, 58},
+  }},
+  { .v = {
+    {127, 63, 59},
+    {128, 64, 59},
+    {143, 79, 59},
+    {142, 78, 59},
+  }},
+  { .v = {
+    {128, 64, 60},
+    {129, 65, 60},
+    {144, 80, 60},
+    {143, 79, 60},
+  }},
+  { .v = {
+    {129, 65, 61},
+    {130, 66, 61},
+    {145, 81, 61},
+    {144, 80, 61},
+  }},
+  { .v = {
+    {130, 66, 62},
+    {131, 67, 62},
+    {146, 82, 62},
+    {145, 81, 62},
+  }},
+  { .v = {
+    {131, 67, 63},
+    {132, 68, 63},
+    {147, 83, 63},
+    {146, 82, 63},
+  }},
+  { .v = {
+    {132, 68, 64},
+    {133, 69, 64},
+    {148, 84, 64},
+    {147, 83, 64},
+  }},
+  { .v = {
+    {133, 69, 65},
+    {134, 70, 65},
+    {149, 85, 65},
+    {148, 84, 65},
+  }},
+  { .v = {
+    {134, 70, 66},
+    {135, 71, 66},
+    {150, 86, 66},
+    {149, 85, 66},
+  }},
+  { .v = {
+    {135, 71, 67},
+    {136, 72, 67},
+    {151, 87, 67},
+    {150, 86, 67},
+  }},
+  { .v = {
+    {136, 72, 68},
+    {137, 73, 68},
+    {152, 88, 68},
+    {151, 87, 68},
+  }},
+  { .v = {
+    {137, 73, 69},
+    {138, 74, 69},
+    {153, 89, 69},
+    {152, 88, 69},
+  }},
+  { .v = {
+    {139, 76, 70},
+    {140, 75, 70},
+    {155, 90, 70},
+    {154, 91, 70},
+  }},
+  { .v = {
+    {140, 75, 71},
+    {141, 77, 71},
+    {156, 92, 71},
+    {155, 90, 71},
+  }},
+  { .v = {
+    {141, 77, 72},
+    {142, 78, 72},
+    {157, 93, 72},
+    {156, 92, 72},
+  }},
+  { .v = {
+    {142, 78, 73},
+    {143, 79, 73},
+    {158, 94, 73},
+    {157, 93, 73},
+  }},
+  { .v = {
+    {143, 79, 74},
+    {144, 80, 74},
+    {159, 95, 74},
+    {158, 94, 74},
+  }},
+  { .v = {
+    {144, 80, 75},
+    {145, 81, 75},
+    {160, 96, 75},
+    {159, 95, 75},
+  }},
+  { .v = {
+    {145, 81, 76},
+    {146, 82, 76},
+    {161, 97, 76},
+    {160, 96, 76},
+  }},
+  { .v = {
+    {146, 82, 77},
+    {147, 83, 77},
+    {162, 98, 77},
+    {161, 97, 77},
+  }},
+  { .v = {
+    {147, 83, 78},
+    {148, 84, 78},
+    {163, 99, 78},
+    {162, 98, 78},
+  }},
+  { .v = {
+    {148, 84, 79},
+    {149, 85, 79},
+    {164, 100, 79},
+    {163, 99, 79},
+  }},
+  { .v = {
+    {149, 85, 80},
+    {150, 86, 80},
+    {165, 101, 80},
+    {164, 100, 80},
+  }},
+  { .v = {
+    {150, 86, 81},
+    {151, 87, 81},
+    {166, 102, 81},
+    {165, 101, 81},
+  }},
+  { .v = {
+    {151, 87, 82},
+    {152, 88, 82},
+    {167, 103, 82},
+    {166, 102, 82},
+  }},
+  { .v = {
+    {152, 88, 83},
+    {153, 89, 83},
+    {168, 104, 83},
+    {167, 103, 83},
+  }},
+  { .v = {
+    {154, 91, 84},
+    {155, 90, 84},
+    {170, 105, 84},
+    {169, 106, 84},
+  }},
+  { .v = {
+    {155, 90, 85},
+    {156, 92, 85},
+    {171, 107, 85},
+    {170, 105, 85},
+  }},
+  { .v = {
+    {156, 92, 86},
+    {157, 93, 86},
+    {172, 108, 86},
+    {171, 107, 86},
+  }},
+  { .v = {
+    {157, 93, 87},
+    {158, 94, 87},
+    {173, 109, 87},
+    {172, 108, 87},
+  }},
+  { .v = {
+    {158, 94, 88},
+    {159, 95, 88},
+    {174, 110, 88},
+    {173, 109, 88},
+  }},
+  { .v = {
+    {159, 95, 89},
+    {160, 96, 89},
+    {175, 111, 89},
+    {174, 110, 89},
+  }},
+  { .v = {
+    {160, 96, 90},
+    {161, 97, 90},
+    {176, 112, 90},
+    {175, 111, 90},
+  }},
+  { .v = {
+    {161, 97, 91},
+    {162, 98, 91},
+    {177, 113, 91},
+    {176, 112, 91},
+  }},
+  { .v = {
+    {162, 98, 92},
+    {163, 99, 92},
+    {178, 114, 92},
+    {177, 113, 92},
+  }},
+  { .v = {
+    {163, 99, 93},
+    {164, 100, 93},
+    {179, 115, 93},
+    {178, 114, 93},
+  }},
+  { .v = {
+    {164, 100, 94},
+    {165, 101, 94},
+    {180, 116, 94},
+    {179, 115, 94},
+  }},
+  { .v = {
+    {165, 101, 95},
+    {166, 102, 95},
+    {181, 117, 95},
+    {180, 116, 95},
+  }},
+  { .v = {
+    {166, 102, 96},
+    {167, 103, 96},
+    {182, 118, 96},
+    {181, 117, 96},
+  }},
+  { .v = {
+    {167, 103, 97},
+    {168, 104, 97},
+    {183, 119, 97},
+    {182, 118, 97},
+  }},
+  { .v = {
+    {169, 106, 98},
+    {170, 105, 98},
+    {185, 120, 98},
+    {184, 121, 98},
+  }},
+  { .v = {
+    {170, 105, 99},
+    {171, 107, 99},
+    {186, 122, 99},
+    {185, 120, 99},
+  }},
+  { .v = {
+    {171, 107, 100},
+    {172, 108, 100},
+    {187, 123, 100},
+    {186, 122, 100},
+  }},
+  { .v = {
+    {172, 108, 101},
+    {173, 109, 101},
+    {188, 124, 101},
+    {187, 123, 101},
+  }},
+  { .v = {
+    {173, 109, 102},
+    {174, 110, 102},
+    {189, 125, 102},
+    {188, 124, 102},
+  }},
+  { .v = {
+    {174, 110, 103},
+    {175, 111, 103},
+    {190, 126, 103},
+    {189, 125, 103},
+  }},
+  { .v = {
+    {175, 111, 104},
+    {176, 112, 104},
+    {191, 127, 104},
+    {190, 126, 104},
+  }},
+  { .v = {
+    {176, 112, 105},
+    {177, 113, 105},
+    {192, 128, 105},
+    {191, 127, 105},
+  }},
+  { .v = {
+    {177, 113, 106},
+    {178, 114, 106},
+    {193, 129, 106},
+    {192, 128, 106},
+  }},
+  { .v = {
+    {178, 114, 107},
+    {179, 115, 107},
+    {194, 130, 107},
+    {193, 129, 107},
+  }},
+  { .v = {
+    {179, 115, 108},
+    {180, 116, 108},
+    {195, 131, 108},
+    {194, 130, 108},
+  }},
+  { .v = {
+    {180, 116, 109},
+    {181, 117, 109},
+    {196, 132, 109},
+    {195, 131, 109},
+  }},
+  { .v = {
+    {181, 117, 110},
+    {182, 118, 110},
+    {197, 133, 110},
+    {196, 132, 110},
+  }},
+  { .v = {
+    {182, 118, 111},
+    {183, 119, 111},
+    {198, 134, 111},
+    {197, 133, 111},
+  }},
+  { .v = {
+    {184, 121, 112},
+    {185, 120, 112},
+    {200, 135, 112},
+    {199, 136, 112},
+  }},
+  { .v = {
+    {185, 120, 113},
+    {186, 122, 113},
+    {201, 137, 113},
+    {200, 135, 113},
+  }},
+  { .v = {
+    {186, 122, 114},
+    {187, 123, 114},
+    {202, 138, 114},
+    {201, 137, 114},
+  }},
+  { .v = {
+    {187, 123, 115},
+    {188, 124, 115},
+    {203, 139, 115},
+    {202, 138, 115},
+  }},
+  { .v = {
+    {188, 124, 116},
+    {189, 125, 116},
+    {204, 140, 116},
+    {203, 139, 116},
+  }},
+  { .v = {
+    {189, 125, 117},
+    {190, 126, 117},
+    {205, 141, 117},
+    {204, 140, 117},
+  }},
+  { .v = {
+    {190, 126, 118},
+    {191, 127, 118},
+    {206, 142, 118},
+    {205, 141, 118},
+  }},
+  { .v = {
+    {191, 127, 119},
+    {192, 128, 119},
+    {207, 143, 119},
+    {206, 142, 119},
+  }},
+  { .v = {
+    {192, 128, 120},
+    {193, 129, 120},
+    {208, 144, 120},
+    {207, 143, 120},
+  }},
+  { .v = {
+    {193, 129, 121},
+    {194, 130, 121},
+    {209, 145, 121},
+    {208, 144, 121},
+  }},
+  { .v = {
+    {194, 130, 122},
+    {195, 131, 122},
+    {210, 146, 122},
+    {209, 145, 122},
+  }},
+  { .v = {
+    {195, 131, 123},
+    {196, 132, 123},
+    {211, 147, 123},
+    {210, 146, 123},
+  }},
+  { .v = {
+    {196, 132, 124},
+    {197, 133, 124},
+    {212, 148, 124},
+    {211, 147, 124},
+  }},
+  { .v = {
+    {197, 133, 125},
+    {198, 134, 125},
+    {213, 149, 125},
+    {212, 148, 125},
+  }},
+  { .v = {
+    {199, 136, 126},
+    {200, 135, 126},
+    {215, 150, 126},
+    {214, 151, 126},
+  }},
+  { .v = {
+    {200, 135, 127},
+    {201, 137, 127},
+    {216, 152, 127},
+    {215, 150, 127},
+  }},
+  { .v = {
+    {201, 137, 128},
+    {202, 138, 128},
+    {217, 153, 128},
+    {216, 152, 128},
+  }},
+  { .v = {
+    {202, 138, 129},
+    {203, 139, 129},
+    {218, 154, 129},
+    {217, 153, 129},
+  }},
+  { .v = {
+    {203, 139, 130},
+    {204, 140, 130},
+    {219, 155, 130},
+    {218, 154, 130},
+  }},
+  { .v = {
+    {204, 140, 131},
+    {205, 141, 131},
+    {220, 156, 131},
+    {219, 155, 131},
+  }},
+  { .v = {
+    {205, 141, 132},
+    {206, 142, 132},
+    {221, 157, 132},
+    {220, 156, 132},
+  }},
+  { .v = {
+    {206, 142, 133},
+    {207, 143, 133},
+    {222, 158, 133},
+    {221, 157, 133},
+  }},
+  { .v = {
+    {207, 143, 134},
+    {208, 144, 134},
+    {223, 159, 134},
+    {222, 158, 134},
+  }},
+  { .v = {
+    {208, 144, 135},
+    {209, 145, 135},
+    {224, 160, 135},
+    {223, 159, 135},
+  }},
+  { .v = {
+    {209, 145, 136},
+    {210, 146, 136},
+    {225, 161, 136},
+    {224, 160, 136},
+  }},
+  { .v = {
+    {210, 146, 137},
+    {211, 147, 137},
+    {226, 162, 137},
+    {225, 161, 137},
+  }},
+  { .v = {
+    {211, 147, 138},
+    {212, 148, 138},
+    {227, 163, 138},
+    {226, 162, 138},
+  }},
+  { .v = {
+    {212, 148, 139},
+    {213, 149, 139},
+    {228, 164, 139},
+    {227, 163, 139},
+  }},
+  { .v = {
+    {214, 151, 140},
+    {215, 150, 140},
+    {230, 165, 140},
+    {229, 166, 140},
+  }},
+  { .v = {
+    {215, 150, 141},
+    {216, 152, 141},
+    {231, 167, 141},
+    {230, 165, 141},
+  }},
+  { .v = {
+    {216, 152, 142},
+    {217, 153, 142},
+    {232, 168, 142},
+    {231, 167, 142},
+  }},
+  { .v = {
+    {217, 153, 143},
+    {218, 154, 143},
+    {233, 169, 143},
+    {232, 168, 143},
+  }},
+  { .v = {
+    {218, 154, 144},
+    {219, 155, 144},
+    {234, 170, 144},
+    {233, 169, 144},
+  }},
+  { .v = {
+    {219, 155, 145},
+    {220, 156, 145},
+    {235, 171, 145},
+    {234, 170, 145},
+  }},
+  { .v = {
+    {220, 156, 146},
+    {221, 157, 146},
+    {236, 172, 146},
+    {235, 171, 146},
+  }},
+  { .v = {
+    {221, 157, 147},
+    {222, 158, 147},
+    {237, 173, 147},
+    {236, 172, 147},
+  }},
+  { .v = {
+    {222, 158, 148},
+    {223, 159, 148},
+    {238, 174, 148},
+    {237, 173, 148},
+  }},
+  { .v = {
+    {223, 159, 149},
+    {224, 160, 149},
+    {239, 175, 149},
+    {238, 174, 149},
+  }},
+  { .v = {
+    {224, 160, 150},
+    {225, 161, 150},
+    {240, 176, 150},
+    {239, 175, 150},
+  }},
+  { .v = {
+    {225, 161, 151},
+    {226, 162, 151},
+    {241, 177, 151},
+    {240, 176, 151},
+  }},
+  { .v = {
+    {226, 162, 152},
+    {227, 163, 152},
+    {242, 178, 152},
+    {241, 177, 152},
+  }},
+  { .v = {
+    {227, 163, 153},
+    {228, 164, 153},
+    {243, 179, 153},
+    {242, 178, 153},
+  }},
+  { .v = {
+    {229, 166, 154},
+    {230, 165, 154},
+    {245, 180, 154},
+    {244, 181, 154},
+  }},
+  { .v = {
+    {230, 165, 155},
+    {231, 167, 155},
+    {246, 182, 155},
+    {245, 180, 155},
+  }},
+  { .v = {
+    {231, 167, 156},
+    {232, 168, 156},
+    {247, 183, 156},
+    {246, 182, 156},
+  }},
+  { .v = {
+    {232, 168, 157},
+    {233, 169, 157},
+    {248, 184, 157},
+    {247, 183, 157},
+  }},
+  { .v = {
+    {233, 169, 158},
+    {234, 170, 158},
+    {249, 185, 158},
+    {248, 184, 158},
+  }},
+  { .v = {
+    {234, 170, 159},
+    {235, 171, 159},
+    {250, 186, 159},
+    {249, 185, 159},
+  }},
+  { .v = {
+    {235, 171, 160},
+    {236, 172, 160},
+    {251, 187, 160},
+    {250, 186, 160},
+  }},
+  { .v = {
+    {236, 172, 161},
+    {237, 173, 161},
+    {252, 188, 161},
+    {251, 187, 161},
+  }},
+  { .v = {
+    {237, 173, 162},
+    {238, 174, 162},
+    {253, 189, 162},
+    {252, 188, 162},
+  }},
+  { .v = {
+    {238, 174, 163},
+    {239, 175, 163},
+    {254, 190, 163},
+    {253, 189, 163},
+  }},
+  { .v = {
+    {239, 175, 164},
+    {240, 176, 164},
+    {255, 191, 164},
+    {254, 190, 164},
+  }},
+  { .v = {
+    {240, 176, 165},
+    {241, 177, 165},
+    {256, 192, 165},
+    {255, 191, 165},
+  }},
+  { .v = {
+    {241, 177, 166},
+    {242, 178, 166},
+    {257, 193, 166},
+    {256, 192, 166},
+  }},
+  { .v = {
+    {242, 178, 167},
+    {243, 179, 167},
+    {258, 194, 167},
+    {257, 193, 167},
+  }},
+  { .v = {
+    {244, 181, 168},
+    {245, 180, 168},
+    {260, 195, 168},
+    {259, 196, 168},
+  }},
+  { .v = {
+    {245, 180, 169},
+    {246, 182, 169},
+    {261, 197, 169},
+    {260, 195, 169},
+  }},
+  { .v = {
+    {246, 182, 170},
+    {247, 183, 170},
+    {262, 198, 170},
+    {261, 197, 170},
+  }},
+  { .v = {
+    {247, 183, 171},
+    {248, 184, 171},
+    {263, 199, 171},
+    {262, 198, 171},
+  }},
+  { .v = {
+    {248, 184, 172},
+    {249, 185, 172},
+    {264, 200, 172},
+    {263, 199, 172},
+  }},
+  { .v = {
+    {249, 185, 173},
+    {250, 186, 173},
+    {265, 201, 173},
+    {264, 200, 173},
+  }},
+  { .v = {
+    {250, 186, 174},
+    {251, 187, 174},
+    {266, 202, 174},
+    {265, 201, 174},
+  }},
+  { .v = {
+    {251, 187, 175},
+    {252, 188, 175},
+    {267, 203, 175},
+    {266, 202, 175},
+  }},
+  { .v = {
+    {252, 188, 176},
+    {253, 189, 176},
+    {268, 204, 176},
+    {267, 203, 176},
+  }},
+  { .v = {
+    {253, 189, 177},
+    {254, 190, 177},
+    {269, 205, 177},
+    {268, 204, 177},
+  }},
+  { .v = {
+    {254, 190, 178},
+    {255, 191, 178},
+    {270, 206, 178},
+    {269, 205, 178},
+  }},
+  { .v = {
+    {255, 191, 179},
+    {256, 192, 179},
+    {271, 207, 179},
+    {270, 206, 179},
+  }},
+  { .v = {
+    {256, 192, 180},
+    {257, 193, 180},
+    {272, 208, 180},
+    {271, 207, 180},
+  }},
+  { .v = {
+    {257, 193, 181},
+    {258, 194, 181},
+    {273, 209, 181},
+    {272, 208, 181},
+  }},
+  { .v = {
+    {259, 196, 182},
+    {260, 195, 182},
+    {275, 210, 182},
+    {274, 211, 182},
+  }},
+  { .v = {
+    {260, 195, 183},
+    {261, 197, 183},
+    {276, 212, 183},
+    {275, 210, 183},
+  }},
+  { .v = {
+    {261, 197, 184},
+    {262, 198, 184},
+    {277, 213, 184},
+    {276, 212, 184},
+  }},
+  { .v = {
+    {262, 198, 185},
+    {263, 199, 185},
+    {278, 214, 185},
+    {277, 213, 185},
+  }},
+  { .v = {
+    {263, 199, 186},
+    {264, 200, 186},
+    {279, 215, 186},
+    {278, 214, 186},
+  }},
+  { .v = {
+    {264, 200, 187},
+    {265, 201, 187},
+    {280, 216, 187},
+    {279, 215, 187},
+  }},
+  { .v = {
+    {265, 201, 188},
+    {266, 202, 188},
+    {281, 217, 188},
+    {280, 216, 188},
+  }},
+  { .v = {
+    {266, 202, 189},
+    {267, 203, 189},
+    {282, 218, 189},
+    {281, 217, 189},
+  }},
+  { .v = {
+    {267, 203, 190},
+    {268, 204, 190},
+    {283, 219, 190},
+    {282, 218, 190},
+  }},
+  { .v = {
+    {268, 204, 191},
+    {269, 205, 191},
+    {284, 220, 191},
+    {283, 219, 191},
+  }},
+  { .v = {
+    {269, 205, 192},
+    {270, 206, 192},
+    {285, 221, 192},
+    {284, 220, 192},
+  }},
+  { .v = {
+    {270, 206, 193},
+    {271, 207, 193},
+    {286, 222, 193},
+    {285, 221, 193},
+  }},
+  { .v = {
+    {271, 207, 194},
+    {272, 208, 194},
+    {287, 223, 194},
+    {286, 222, 194},
+  }},
+  { .v = {
+    {272, 208, 195},
+    {273, 209, 195},
+    {288, 224, 195},
+    {287, 223, 195},
+  }},
+  { .v = {
+    {0, 225, 196},
+    {19, 226, 196},
+    {64, 0, 196},
+    {18, 227, 196},
+  }},
+  { .v = {
+    {19, 226, 197},
+    {20, 228, 197},
+    {65, 1, 197},
+    {64, 0, 197},
+  }},
+  { .v = {
+    {20, 228, 198},
+    {21, 229, 198},
+    {66, 4, 198},
+    {65, 1, 198},
+  }},
+  { .v = {
+    {21, 229, 199},
+    {22, 230, 199},
+    {67, 6, 199},
+    {66, 4, 199},
+  }},
+  { .v = {
+    {22, 230, 200},
+    {23, 231, 200},
+    {68, 8, 200},
+    {67, 6, 200},
+  }},
+  { .v = {
+    {23, 231, 201},
+    {24, 232, 201},
+    {69, 10, 201},
+    {68, 8, 201},
+  }},
+  { .v = {
+    {24, 232, 202},
+    {25, 233, 202},
+    {70, 12, 202},
+    {69, 10, 202},
+  }},
+  { .v = {
+    {25, 233, 203},
+    {26, 234, 203},
+    {71, 14, 203},
+    {70, 12, 203},
+  }},
+  { .v = {
+    {26, 234, 204},
+    {27, 235, 204},
+    {72, 16, 204},
+    {71, 14, 204},
+  }},
+  { .v = {
+    {27, 235, 205},
+    {28, 236, 205},
+    {73, 18, 205},
+    {72, 16, 205},
+  }},
+  { .v = {
+    {28, 236, 206},
+    {29, 237, 206},
+    {74, 20, 206},
+    {73, 18, 206},
+  }},
+  { .v = {
+    {29, 237, 207},
+    {30, 238, 207},
+    {75, 22, 207},
+    {74, 20, 207},
+  }},
+  { .v = {
+    {30, 238, 208},
+    {31, 239, 208},
+    {76, 24, 208},
+    {75, 22, 208},
+  }},
+  { .v = {
+    {31, 239, 209},
+    {32, 240, 209},
+    {77, 26, 209},
+    {76, 24, 209},
+  }},
+  { .v = {
+    {32, 240, 210},
+    {33, 241, 210},
+    {78, 28, 210},
+    {77, 26, 210},
+  }},
+  { .v = {
+    {33, 241, 211},
+    {1, 242, 211},
+    {34, 243, 211},
+    {78, 28, 211},
+  }},
+  { .v = {
+    {78, 28, 212},
+    {34, 243, 212},
+    {35, 244, 212},
+    {93, 29, 212},
+  }},
+  { .v = {
+    {93, 29, 213},
+    {35, 244, 213},
+    {36, 245, 213},
+    {108, 44, 213},
+  }},
+  { .v = {
+    {108, 44, 214},
+    {36, 245, 214},
+    {37, 246, 214},
+    {123, 59, 214},
+  }},
+  { .v = {
+    {123, 59, 215},
+    {37, 246, 215},
+    {38, 247, 215},
+    {138, 74, 215},
+  }},
+  { .v = {
+    {138, 74, 216},
+    {38, 247, 216},
+    {39, 248, 216},
+    {153, 89, 216},
+  }},
+  { .v = {
+    {153, 89, 217},
+    {39, 248, 217},
+    {40, 249, 217},
+    {168, 104, 217},
+  }},
+  { .v = {
+    {168, 104, 218},
+    {40, 249, 218},
+    {41, 250, 218},
+    {183, 119, 218},
+  }},
+  { .v = {
+    {183, 119, 219},
+    {41, 250, 219},
+    {42, 251, 219},
+    {198, 134, 219},
+  }},
+  { .v = {
+    {198, 134, 220},
+    {42, 251, 220},
+    {43, 252, 220},
+    {213, 149, 220},
+  }},
+  { .v = {
+    {213, 149, 221},
+    {43, 252, 221},
+    {44, 253, 221},
+    {228, 164, 221},
+  }},
+  { .v = {
+    {228, 164, 222},
+    {44, 253, 222},
+    {45, 254, 222},
+    {243, 179, 222},
+  }},
+  { .v = {
+    {243, 179, 223},
+    {45, 254, 223},
+    {46, 255, 223},
+    {258, 194, 223},
+  }},
+  { .v = {
+    {258, 194, 224},
+    {46, 255, 224},
+    {47, 256, 224},
+    {273, 209, 224},
+  }},
+  { .v = {
+    {273, 209, 225},
+    {47, 256, 225},
+    {48, 257, 225},
+    {288, 224, 225},
+  }},
+  { .v = {
+    {288, 224, 226},
+    {48, 257, 226},
+    {3, 258, 226},
+    {49, 259, 226},
+  }},
+  { .v = {
+    {287, 223, 227},
+    {288, 224, 227},
+    {49, 259, 227},
+    {50, 260, 227},
+  }},
+  { .v = {
+    {286, 222, 228},
+    {287, 223, 228},
+    {50, 260, 228},
+    {51, 261, 228},
+  }},
+  { .v = {
+    {285, 221, 229},
+    {286, 222, 229},
+    {51, 261, 229},
+    {52, 262, 229},
+  }},
+  { .v = {
+    {284, 220, 230},
+    {285, 221, 230},
+    {52, 262, 230},
+    {53, 263, 230},
+  }},
+  { .v = {
+    {283, 219, 231},
+    {284, 220, 231},
+    {53, 263, 231},
+    {54, 264, 231},
+  }},
+  { .v = {
+    {282, 218, 232},
+    {283, 219, 232},
+    {54, 264, 232},
+    {55, 265, 232},
+  }},
+  { .v = {
+    {281, 217, 233},
+    {282, 218, 233},
+    {55, 265, 233},
+    {56, 266, 233},
+  }},
+  { .v = {
+    {280, 216, 234},
+    {281, 217, 234},
+    {56, 266, 234},
+    {57, 267, 234},
+  }},
+  { .v = {
+    {279, 215, 235},
+    {280, 216, 235},
+    {57, 267, 235},
+    {58, 268, 235},
+  }},
+  { .v = {
+    {278, 214, 236},
+    {279, 215, 236},
+    {58, 268, 236},
+    {59, 269, 236},
+  }},
+  { .v = {
+    {277, 213, 237},
+    {278, 214, 237},
+    {59, 269, 237},
+    {60, 270, 237},
+  }},
+  { .v = {
+    {276, 212, 238},
+    {277, 213, 238},
+    {60, 270, 238},
+    {61, 271, 238},
+  }},
+  { .v = {
+    {275, 210, 239},
+    {276, 212, 239},
+    {61, 271, 239},
+    {62, 272, 239},
+  }},
+  { .v = {
+    {274, 211, 240},
+    {275, 210, 240},
+    {62, 272, 240},
+    {63, 273, 240},
+  }},
+  { .v = {
+    {4, 274, 241},
+    {274, 211, 241},
+    {63, 273, 241},
+    {2, 275, 241},
+  }},
+  { .v = {
+    {5, 276, 242},
+    {259, 196, 242},
+    {274, 211, 242},
+    {4, 274, 242},
+  }},
+  { .v = {
+    {6, 277, 243},
+    {244, 181, 243},
+    {259, 196, 243},
+    {5, 276, 243},
+  }},
+  { .v = {
+    {7, 278, 244},
+    {229, 166, 244},
+    {244, 181, 244},
+    {6, 277, 244},
+  }},
+  { .v = {
+    {8, 279, 245},
+    {214, 151, 245},
+    {229, 166, 245},
+    {7, 278, 245},
+  }},
+  { .v = {
+    {9, 280, 246},
+    {199, 136, 246},
+    {214, 151, 246},
+    {8, 279, 246},
+  }},
+  { .v = {
+    {10, 281, 247},
+    {184, 121, 247},
+    {199, 136, 247},
+    {9, 280, 247},
+  }},
+  { .v = {
+    {11, 282, 248},
+    {169, 106, 248},
+    {184, 121, 248},
+    {10, 281, 248},
+  }},
+  { .v = {
+    {12, 283, 249},
+    {154, 91, 249},
+    {169, 106, 249},
+    {11, 282, 249},
+  }},
+  { .v = {
+    {13, 284, 250},
+    {139, 76, 250},
+    {154, 91, 250},
+    {12, 283, 250},
+  }},
+  { .v = {
+    {14, 285, 251},
+    {124, 61, 251},
+    {139, 76, 251},
+    {13, 284, 251},
+  }},
+  { .v = {
+    {15, 286, 252},
+    {109, 46, 252},
+    {124, 61, 252},
+    {14, 285, 252},
+  }},
+  { .v = {
+    {16, 287, 253},
+    {94, 31, 253},
+    {109, 46, 253},
+    {15, 286, 253},
+  }},
+  { .v = {
+    {17, 288, 254},
+    {79, 3, 254},
+    {94, 31, 254},
+    {16, 287, 254},
+  }},
+  { .v = {
+    {18, 227, 255},
+    {64, 0, 255},
+    {79, 3, 255},
+    {17, 288, 255},
+  }},
+};
+
+const struct object plane_Plane = {
+  .triangle = NULL,
+  .quadrilateral = &plane_Plane_quadrilateral[0],
+  .triangle_count = 0,
+  .quadrilateral_count = 256,
+  .material = -1,
+};
+
+const struct object * plane_object_list[] = {
+  &plane_Plane,
+};
+
+const struct model plane_model = {
+  .position = &plane_position[0],
+  .texture = &plane_texture[0],
+  .normal = &plane_normal[0],
+  .object = &plane_object_list[0],
+  .object_count = 1,
+};
+
diff --git a/model/plane/plane.blend b/model/plane/plane.blend
new file mode 100644
index 0000000..87c0aec
Binary files /dev/null and b/model/plane/plane.blend differ
diff --git a/model/plane/plane.mtl b/model/plane/plane.mtl
new file mode 100644
index 0000000..6371c06
--- /dev/null
+++ b/model/plane/plane.mtl
@@ -0,0 +1,2 @@
+# Blender 4.3.2 MTL File: 'plane.blend'
+# www.blender.org
diff --git a/model/plane/plane.obj b/model/plane/plane.obj
new file mode 100644
index 0000000..f8e69d0
--- /dev/null
+++ b/model/plane/plane.obj
@@ -0,0 +1,1095 @@
+# Blender 4.3.2
+# www.blender.org
+mtllib plane.mtl
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diff --git a/tools/ttf_bitmap.cpp b/tools/ttf_bitmap.cpp
index 884ab8d..60d2c97 100644
--- a/tools/ttf_bitmap.cpp
+++ b/tools/ttf_bitmap.cpp
@@ -7,6 +7,23 @@
 #include <ft2build.h>
 #include FT_FREETYPE_H
 
+#include "../twiddle.hpp"
+
+bool is_power(int n)
+{
+  const int min_power = 8;
+  const int max_power = 1024;
+  int power = min_power;
+
+  while (power <= max_power) {
+    if (n == power)
+      return true;
+    power *= 2;
+  }
+  printf("%d\n", n);
+  return false;
+}
+
 int32_t
 load_bitmap_char(FT_Face face,
 		 FT_ULong char_code,
@@ -25,26 +42,24 @@ load_bitmap_char(FT_Face face,
   //printf("num_grays %d\n", face->glyph->bitmap.num_grays);
   //printf("pitch %d\n", face->glyph->bitmap.pitch);
   //printf("width %d\n", face->glyph->bitmap.width);
-  //printf("char_code %lx rows %d\n", char_code, face->glyph->bitmap.rows);
-  //assert((face->glyph->bitmap.rows % 8) == 0);
-  //assert(face->glyph->bitmap.width / face->glyph->bitmap.pitch == 8);
+  //printf("rows %d\n", face->glyph->bitmap.rows);
+  assert(face->glyph->bitmap.num_grays == 2);
+  assert(is_power(face->glyph->bitmap.rows));
+  assert(is_power(face->glyph->bitmap.width));
+  assert((int)(face->glyph->bitmap.pitch * 8) == (int)(face->glyph->bitmap.width));
 
   for (int y = 0; y < (int)face->glyph->bitmap.rows; y++) {
     uint8_t * row = &face->glyph->bitmap.buffer[y * face->glyph->bitmap.pitch];
-    uint8_t row_out = 0;
-    for (unsigned int x = 0; x < face->glyph->bitmap.width; x++) {
-      if (x % 8 == 0) row_out = 0;
-      const uint8_t bit = (row[x / 8] >> (7 - (x % 8))) & 1;
-      std::cerr << (bit ? "█" : " ");
-      row_out |= (bit << (x % 8));
-      if (x % 8 == 7 || x == (face->glyph->bitmap.width - 1))
-        buf[(y * face->glyph->bitmap.pitch) + (x / 8)] = row_out;
+    for (int x = 0; x < (int)face->glyph->bitmap.width; x += 1) {
+      const int bit = (row[x / 8] >> (7 - (x % 8))) & 1;
+      //std::cerr << (bit ? "█" : " ");
+      buf[y * face->glyph->bitmap.width + x] = bit;
     }
-    std::cerr << "|\n";
+    //std::cerr << "|\n";
   }
 
   // 'pitch' is bytes; 'width' is pixels
-  return face->glyph->bitmap.rows * face->glyph->bitmap.pitch;
+  return face->glyph->bitmap.rows * face->glyph->bitmap.width;
 }
 
 template <typename T>
@@ -95,11 +110,16 @@ int main(int argc, char *argv[])
 
   assert(end > start);
 
-  uint32_t pixels_per_glyph = (face->size->metrics.height * face->size->metrics.max_advance);
+  int width = face->size->metrics.max_advance >> 6;
+  int height = face->size->metrics.height >> 6;
+  uint32_t pixels_per_glyph = width * height;
   assert(pixels_per_glyph % 8 == 0);
-  uint32_t bytes_per_glyph = pixels_per_glyph / 8;
+  uint32_t bytes_per_glyph = pixels_per_glyph;
   uint32_t num_glyphs = (end - start) + 1;
-  uint8_t buf[bytes_per_glyph * num_glyphs];
+  uint32_t buf_size = bytes_per_glyph * num_glyphs;
+  uint8_t * buf = (uint8_t *)malloc(buf_size);
+
+  uint8_t * twiddle_buf = (uint8_t *)malloc(buf_size / 2);
 
   uint32_t bitmap_offset = 0;
   for (uint32_t char_code = start; char_code <= end; char_code++) {
@@ -111,16 +131,22 @@ int main(int argc, char *argv[])
       return -1;
     }
 
+    printf("twiddle %d %d %d %d\n", bitmap_offset, bitmap_offset / 2, width, height);
+    twiddle::texture_4bpp(&twiddle_buf[bitmap_offset / 2],
+                          &buf[bitmap_offset],
+                          width,
+                          height);
+
     bitmap_offset += bitmap_size;
-    assert(bitmap_offset < (sizeof (buf)));
+    assert(bitmap_offset <= buf_size);
   }
-  std::cerr << "bitmap_offset: 0x"  << std::dec << bitmap_offset << '\n';
+  printf("bitmap_offset: %d\n", bitmap_offset);
 
   FILE * out = fopen(output_file_path, "w");
   if (out == NULL) {
     perror("fopen(w)");
     return -1;
   }
-  fwrite(reinterpret_cast<void*>(&buf), bitmap_offset, 1, out);
+  fwrite(reinterpret_cast<void*>(twiddle_buf), bitmap_offset / 2, 1, out);
   fclose(out);
 }