example building 2

src/dusk/asset/loader/CMakeLists.txt

@@ -16,3 +16,4 @@ add_subdirectory(display)
 add_subdirectory(locale)
 add_subdirectory(json)
 add_subdirectory(chunk)
+add_subdirectory(dmf)

src/dusk/asset/loader/assetloader.c

@@ -45,4 +45,10 @@ assetloadercallbacks_t ASSET_LOADER_CALLBACKS[ASSET_LOADER_TYPE_COUNT] = {
     .loadAsync = assetChunkLoaderAsync,
     .dispose = assetChunkDispose
   },
+
+  [ASSET_LOADER_TYPE_DMF] = {
+    .loadSync = assetDmfLoaderSync,
+    .loadAsync = assetDmfLoaderAsync,
+    .dispose = assetDmfDispose
+  },
 };

src/dusk/asset/loader/assetloader.h

@@ -12,6 +12,7 @@
 #include "asset/loader/locale/assetlocaleloader.h"
 #include "asset/loader/json/assetjsonloader.h"
 #include "asset/loader/chunk/assetchunkloader.h"
+#include "asset/loader/dmf/assetdmfloader.h"
 
 typedef enum {
   ASSET_LOADER_TYPE_NULL,
@@ -22,6 +23,7 @@ typedef enum {
   ASSET_LOADER_TYPE_LOCALE,
   ASSET_LOADER_TYPE_JSON,
   ASSET_LOADER_TYPE_CHUNK,
+  ASSET_LOADER_TYPE_DMF,
 
   ASSET_LOADER_TYPE_COUNT
 } assetloadertype_t;
@@ -33,6 +35,7 @@ typedef union {
   assetlocaleloaderinput_t locale;
   assetjsonloaderinput_t json;
   assetchunkloaderinput_t chunk;
+  assetdmfloaderinput_t dmf;
 } assetloaderinput_t;
 
 typedef union {
@@ -42,6 +45,7 @@ typedef union {
   assetlocaleloaderloading_t locale;
   assetjsonloaderloading_t json;
   assetchunkloaderloading_t chunk;
+  assetdmfloaderloading_t dmf;
 } assetloaderloading_t;
 
 typedef union {
@@ -51,6 +55,7 @@ typedef union {
   assetlocaleoutput_t locale;
   assetjsonoutput_t json;
   assetchunkoutput_t chunk;
+  assetdmfoutput_t dmf;
 } assetloaderoutput_t;
 
 typedef struct assetloading_s assetloading_t;

src/dusk/asset/loader/chunk/assetchunkloader.c

@@ -85,19 +85,30 @@ errorret_t assetChunkLoaderSync(assetloading_t *loading) {
   memoryCopy(out->tiles, data + offset, tileSize);
   offset += tileSize;
 
-  out->vertCount = endianLittleToHost32(*(uint32_t *)(data + offset));
+  out->meshCount = data[offset];
-  offset += sizeof(uint32_t);
+  offset += sizeof(uint8_t);
-
   assertTrue(
-    out->vertCount <= CHUNK_VERTEX_COUNT,
+    out->meshCount <= CHUNK_MESH_COUNT_MAX,
-    "Chunk vertex count exceeds maximum."
+    "Chunk mesh count exceeds maximum."
   );
 
+  for(uint8_t m = 0; m < out->meshCount; m++) {
+    uint8_t nameLen = 0;
+    while(
+      data[offset + nameLen] != '\0' &&
+      nameLen < CHUNK_MESH_NAME_MAX - 1
+    ) {
+      nameLen++;
+    }
+    memoryCopy(out->meshNames[m], data + offset, nameLen);
+    out->meshNames[m][nameLen] = '\0';
+    offset += nameLen + 1;
+
     memoryCopy(
-    out->vertices,
+      out->meshOffsets[m], data + offset, sizeof(vec3)
-    data + offset,
-    out->vertCount * sizeof(meshvertex_t)
     );
+    offset += sizeof(vec3);
+  }
 
   memoryFree(data);
   loading->loading.chunk.data = NULL;

src/dusk/asset/loader/chunk/assetchunkloader.h

@@ -9,7 +9,7 @@
 #include "asset/assetfile.h"
 #include "rpg/overworld/chunk.h"
 
-#define ASSET_CHUNK_FILE_VERSION 1
+#define ASSET_CHUNK_FILE_VERSION 3
 
 typedef struct assetloading_s assetloading_t;
 typedef struct assetentry_s assetentry_t;
@@ -33,8 +33,9 @@ typedef struct {
 
 typedef struct {
   tile_t tiles[CHUNK_TILE_COUNT];
-  uint32_t vertCount;
+  uint8_t meshCount;
-  meshvertex_t vertices[CHUNK_VERTEX_COUNT];
+  char_t meshNames[CHUNK_MESH_COUNT_MAX][CHUNK_MESH_NAME_MAX];
+  vec3 meshOffsets[CHUNK_MESH_COUNT_MAX];
 } assetchunkoutput_t;
 
 /**
@@ -49,7 +50,8 @@ errorret_t assetChunkLoaderAsync(assetloading_t *loading);
 
 /**
  * Synchronous loader for chunk assets. Validates the DCF binary previously
- * read by the async phase and populates the output assetchunkoutput_t.
+ * read by the async phase and populates the output assetchunkoutput_t with
+ * tile data and DMF mesh names.
  *
  * @param loading Loading information for the asset being loaded.
  * @return Error code indicating success or failure of the load operation.

src/dusk/asset/loader/dmf/CMakeLists.txt

@@ -0,0 +1,9 @@
+# Copyright (c) 2026 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+target_sources(${DUSK_LIBRARY_TARGET_NAME}
+  PUBLIC
+    assetdmfloader.c
+)

src/dusk/asset/loader/dmf/assetdmfloader.c

@@ -0,0 +1,136 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "assetdmfloader.h"
+#include "assert/assert.h"
+#include "util/memory.h"
+#include "util/endian.h"
+#include "asset/loader/assetloading.h"
+#include "asset/loader/assetentry.h"
+
+errorret_t assetDmfLoaderAsync(assetloading_t *loading) {
+  assertNotNull(loading, "Loading cannot be NULL");
+  assertNotMainThread("Should be called from an async thread.");
+
+  if(loading->loading.dmf.state != ASSET_DMF_LOADING_STATE_READ_FILE) {
+    errorOk();
+  }
+
+  assertNull(loading->loading.dmf.data, "Data already defined?");
+
+  assetfile_t *file = &loading->loading.dmf.file;
+  assetLoaderErrorChain(loading,
+    assetFileInit(file, loading->entry->name, NULL, NULL)
+  );
+
+  uint8_t *data = memoryAllocate(file->size);
+  assetLoaderErrorChain(loading, assetFileOpen(file));
+  assetLoaderErrorChain(loading, assetFileRead(file, data, file->size));
+  assetLoaderErrorChain(loading, assetFileClose(file));
+  assetLoaderErrorChain(loading, assetFileDispose(file));
+  assertTrue(
+    file->lastRead == file->size,
+    "Failed to read entire DMF file."
+  );
+
+  loading->loading.dmf.data = data;
+  loading->loading.dmf.state = ASSET_DMF_LOADING_STATE_CREATE_MESH;
+  loading->entry->state = ASSET_ENTRY_STATE_PENDING_SYNC;
+  errorOk();
+}
+
+errorret_t assetDmfLoaderSync(assetloading_t *loading) {
+  assertNotNull(loading, "Loading cannot be NULL");
+  assertTrue(loading->type == ASSET_LOADER_TYPE_DMF, "Invalid type.");
+  assertIsMainThread("Must be called from the main thread.");
+
+  switch(loading->loading.dmf.state) {
+    case ASSET_DMF_LOADING_STATE_INITIAL:
+      loading->loading.dmf.state = ASSET_DMF_LOADING_STATE_READ_FILE;
+      loading->entry->state = ASSET_ENTRY_STATE_PENDING_ASYNC;
+      errorOk();
+      break;
+
+    case ASSET_DMF_LOADING_STATE_CREATE_MESH:
+      break;
+
+    default:
+      errorOk();
+  }
+
+  uint8_t *data = loading->loading.dmf.data;
+  assertNotNull(data, "DMF data should have been loaded by now.");
+
+  if(data[0] != 'D' || data[1] != 'M' || data[2] != 'F') {
+    memoryFree(data);
+    assetLoaderErrorThrow(loading, "Invalid DMF file header");
+  }
+
+  uint32_t version = endianLittleToHost32(*(uint32_t *)(data + 4));
+  if(version != ASSET_DMF_FILE_VERSION) {
+    memoryFree(data);
+    assetLoaderErrorThrow(
+      loading, "Unsupported DMF version %u", version
+    );
+  }
+
+  uint32_t vertCount = endianLittleToHost32(*(uint32_t *)(data + 8));
+  assetdmfoutput_t *out = &loading->entry->data.dmf;
+
+  if(vertCount == 0) {
+    memoryFree(data);
+    loading->loading.dmf.data = NULL;
+    loading->entry->state = ASSET_ENTRY_STATE_LOADED;
+    errorOk();
+  }
+
+  out->vertices = memoryAllocate(vertCount * sizeof(meshvertex_t));
+  memoryCopy(
+    out->vertices, data + 12, vertCount * sizeof(meshvertex_t)
+  );
+  memoryFree(data);
+  loading->loading.dmf.data = NULL;
+
+  errorret_t ret = meshInit(
+    &out->mesh,
+    MESH_PRIMITIVE_TYPE_TRIANGLES,
+    (int32_t)vertCount,
+    out->vertices
+  );
+  if(errorIsNotOk(ret)) {
+    loading->entry->state = ASSET_ENTRY_STATE_ERROR;
+    memoryFree(out->vertices);
+    out->vertices = NULL;
+    errorChain(ret);
+  }
+
+  ret = meshFlush(&out->mesh, 0, (int32_t)vertCount);
+  if(errorIsNotOk(ret)) {
+    loading->entry->state = ASSET_ENTRY_STATE_ERROR;
+    meshDispose(&out->mesh);
+    memoryFree(out->vertices);
+    out->vertices = NULL;
+    errorChain(ret);
+  }
+
+  loading->entry->state = ASSET_ENTRY_STATE_LOADED;
+  errorOk();
+}
+
+errorret_t assetDmfDispose(assetentry_t *entry) {
+  assertNotNull(entry, "Entry cannot be NULL");
+  assertTrue(entry->type == ASSET_LOADER_TYPE_DMF, "Invalid type.");
+  assertIsMainThread("Must be called from the main thread.");
+
+  assetdmfoutput_t *out = &entry->data.dmf;
+  if(out->vertices != NULL) {
+    errorChain(meshDispose(&out->mesh));
+    memoryFree(out->vertices);
+    out->vertices = NULL;
+  }
+  errorOk();
+}

src/dusk/asset/loader/dmf/assetdmfloader.h

@@ -0,0 +1,65 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "asset/assetfile.h"
+#include "display/mesh/mesh.h"
+
+#define ASSET_DMF_FILE_VERSION 1
+
+typedef struct assetloading_s assetloading_t;
+typedef struct assetentry_s assetentry_t;
+
+typedef struct {
+  void *nothing;
+} assetdmfloaderinput_t;
+
+typedef enum {
+  ASSET_DMF_LOADING_STATE_INITIAL,
+  ASSET_DMF_LOADING_STATE_READ_FILE,
+  ASSET_DMF_LOADING_STATE_CREATE_MESH,
+  ASSET_DMF_LOADING_STATE_DONE
+} assetdmfloadingstate_t;
+
+typedef struct {
+  assetfile_t file;
+  assetdmfloadingstate_t state;
+  uint8_t *data;
+} assetdmfloaderloading_t;
+
+typedef struct {
+  mesh_t mesh;
+  meshvertex_t *vertices;
+} assetdmfoutput_t;
+
+/**
+ * Asynchronous loader for DMF mesh assets. Reads the raw DMF file bytes
+ * into the loading buffer so the sync phase can parse without blocking
+ * the main thread on I/O.
+ *
+ * @param loading Loading information for the asset being loaded.
+ * @return Error code indicating success or failure.
+ */
+errorret_t assetDmfLoaderAsync(assetloading_t *loading);
+
+/**
+ * Synchronous loader for DMF mesh assets. Parses the DMF binary read by
+ * the async phase, then initializes and flushes the mesh to the GPU.
+ *
+ * @param loading Loading information for the asset being loaded.
+ * @return Error code indicating success or failure.
+ */
+errorret_t assetDmfLoaderSync(assetloading_t *loading);
+
+/**
+ * Disposer for DMF mesh assets. Disposes the mesh and frees the vertex
+ * buffer.
+ *
+ * @param entry Asset entry containing the DMF data to dispose.
+ * @return Error code indicating success or failure.
+ */
+errorret_t assetDmfDispose(assetentry_t *entry);

src/dusk/display/CMakeLists.txt

@@ -21,7 +21,7 @@ add_subdirectory(texture)
 # Color definitions
 dusk_run_python(
   dusk_color_defs
-  tools.color.csv
+  tools.color
     --csv ${CMAKE_CURRENT_SOURCE_DIR}/color.csv
     --output ${DUSK_GENERATED_HEADERS_DIR}/display/color.h
 )

src/dusk/input/CMakeLists.txt

@@ -14,7 +14,7 @@ target_sources(${DUSK_LIBRARY_TARGET_NAME}
 # Input Action Definitions
 dusk_run_python(
   dusk_input_csv_defs
-  tools.input.csv
+  tools.input
     --csv ${CMAKE_CURRENT_SOURCE_DIR}/input.csv
     --output ${DUSK_GENERATED_HEADERS_DIR}/input/inputactiondefs.h
 )

src/dusk/rpg/entity/entity.c

@@ -43,9 +43,6 @@ void entityUpdate(entity_t *entity) {
   entityAnimUpdate(entity);
 
   // Movement code.
-  if(ENTITY_CALLBACKS[entity->type].freeMovement != NULL) {
-    ENTITY_CALLBACKS[entity->type].freeMovement(entity);
-  }
   if(
     cutsceneModeIsInputAllowed() &&
     ENTITY_CALLBACKS[entity->type].movement != NULL

src/dusk/rpg/entity/entitytype.h

@@ -37,20 +37,6 @@ typedef struct {
    * @param entity Pointer to the entity to move.
    */
   void (*movement)(entity_t *entity);
-
-  /**
-   * Free movement callback. Always runs regardless of cutscene state.
-   * @param entity Pointer to the entity to move.
-   */
-  void (*freeMovement)(entity_t *entity);
-
-  /**
-   * Interaction callback for the entity type.
-   * @param player Pointer to the player entity.
-   * @param entity Pointer to the entity to interact with.
-   * @return True if the entity handled the interaction, false otherwise.
-   */
-  bool_t (*interact)(entity_t *player, entity_t *entity);
 } entitycallback_t;
 
 static const entitycallback_t ENTITY_CALLBACKS[ENTITY_TYPE_COUNT] = {
@@ -64,7 +50,5 @@ static const entitycallback_t ENTITY_CALLBACKS[ENTITY_TYPE_COUNT] = {
   [ENTITY_TYPE_NPC] = {
     .init = npcInit,
     .movement = npcMovement,
-    .freeMovement = npcFreeMovement,
-    .interact = npcInteract
   }
 };

src/dusk/rpg/entity/interact/entityinteract.c

@@ -21,11 +21,20 @@ void entityInteractWith(entity_t *player, entity_t *target) {
         "Interact cutscene pointer cannot be NULL"
       );
       cutsceneSystemStartCutscene(target->interact.data.cutscene);
-      return;
+      break;
 
     case ENTITY_INTERACT_PRINT:
       uiTextboxMainSetText(target->interact.data.message);
-      return;
+
+      // If NPC turn to face player.
+      if(target->type == ENTITY_TYPE_NPC) {
+        target->data.npc.interactState = NPC_INTERACT_STATE_CONVERSING;
+        target->animation = ENTITY_ANIM_IDLE;
+        entityTurn(target, entityDirGetOpposite(player->direction));
+      }
+
+      // entityTurn(player, player->direction); // Redundant (for now)
+      break;
 
     case ENTITY_INTERACT_NULL:
       break;
@@ -34,7 +43,4 @@ void entityInteractWith(entity_t *player, entity_t *target) {
       assertUnreachable("Unknown entity interact type");
       break;
   }
-
-  if(ENTITY_CALLBACKS[target->type].interact == NULL) return;
-  ENTITY_CALLBACKS[target->type].interact(player, target);
 }

src/dusk/rpg/entity/interact/entityinteract.h

@@ -16,8 +16,11 @@ typedef struct entity_s entity_t;
  */
 typedef enum {
   ENTITY_INTERACT_NULL = 0,
+
   ENTITY_INTERACT_CUTSCENE,
   ENTITY_INTERACT_PRINT,
+  ENTITY_INTERACT_CALLBACK,
+
   ENTITY_INTERACT_COUNT
 } entityinteracttype_t;
 
@@ -27,6 +30,7 @@ typedef enum {
 typedef union {
   const cutscene_t *cutscene;
   const char_t *message;
+  void (*callback)(entity_t *player, entity_t *target);
 } entityinteractdata_t;
 
 /**

src/dusk/rpg/entity/npc/npc.c

@@ -12,17 +12,27 @@
 #include "rpg/rpgtextbox.h"
 
 const npcmovecallback_t NPC_MOVE_CALLBACKS[NPC_MOVE_TYPE_COUNT] = {
-  [NPC_MOVE_TYPE_NULL]        = { NULL,               NULL                  },
+  [NPC_MOVE_TYPE_NULL] = { 0 },
-  [NPC_MOVE_TYPE_RANDOM_TURN] = { npcRandomTurnInit,  npcRandomTurnMovement },
+  
+  [NPC_MOVE_TYPE_RANDOM_TURN] = {
+    npcRandomTurnInit,
+    npcRandomTurnMovement
+  },
+
   [NPC_MOVE_TYPE_RANDOM_WALK] = {
     npcRandomWalkInit,
     npcRandomWalkMovement
   },
+
   [NPC_MOVE_TYPE_RANDOM_TURN_AND_WALK] = {
     npcRandomTurnAndWalkInit,
     npcRandomTurnAndWalkMovement
   },
-  [NPC_MOVE_TYPE_PATH] = { npcPathInit, npcPathMovement, true },
+
+  [NPC_MOVE_TYPE_PATH] = {
+    npcPathInit,
+    npcPathMovement
+  },
 };
 
 void npcInit(entity_t *entity) {
@@ -40,23 +50,10 @@ void npcSetMoveType(entity_t *entity, const npcmovetype_t moveType) {
 
 void npcMovement(entity_t *entity) {
   assertNotNull(entity, "Entity pointer cannot be NULL");
+  
   npc_t *npc = &entity->data.npc;
+  if(npc->interactState != NPC_INTERACT_STATE_NONE) return;
+
   const npcmovecallback_t *cb = &NPC_MOVE_CALLBACKS[npc->moveType];
-  if(!cb->alwaysRun && cb->movement != NULL) cb->movement(entity);
+  if(cb->movement != NULL) cb->movement(entity);
-}
-
-void npcFreeMovement(entity_t *entity) {
-  assertNotNull(entity, "Entity pointer cannot be NULL");
-  npc_t *npc = &entity->data.npc;
-  const npcmovecallback_t *cb = &NPC_MOVE_CALLBACKS[npc->moveType];
-  if(cb->alwaysRun && cb->movement != NULL) cb->movement(entity);
-}
-
-bool_t npcInteract(entity_t *player, entity_t *npc) {
-  assertNotNull(player, "Player entity pointer cannot be NULL");
-  assertNotNull(npc, "NPC entity pointer cannot be NULL");
-
-  cutsceneSystemStartCutscene(&TEST_CUTSCENE);
-  // rpgTextboxShow(RPG_TEXTBOX_POS_BOTTOM, "Hello World!");
-  return false;
 }

src/dusk/rpg/entity/npc/npc.h

@@ -13,6 +13,12 @@
 
 typedef struct entity_s entity_t;
 
+typedef enum {
+  NPC_INTERACT_STATE_NONE,
+  NPC_INTERACT_STATE_CONVERSING,
+  NPC_INTERACT_STATE_COUNT
+} npcinteractstate_t;
+
 typedef enum {
   NPC_MOVE_TYPE_NULL,
   NPC_MOVE_TYPE_RANDOM_TURN,
@@ -30,6 +36,7 @@ typedef union {
 } npcmovedata_t;
 
 typedef struct npc_s {
+  npcinteractstate_t interactState;
   npcmovetype_t moveType;
   npcmovedata_t moveData;
 } npc_t;
@@ -39,8 +46,6 @@ typedef struct {
   void (*init)(npc_t *npc);
   /** Called each movement tick. */
   void (*movement)(entity_t *entity);
-  /** True if movement runs regardless of cutscene state. */
-  bool_t alwaysRun;
 } npcmovecallback_t;
 
 extern const npcmovecallback_t NPC_MOVE_CALLBACKS[NPC_MOVE_TYPE_COUNT];
@@ -74,11 +79,3 @@ void npcMovement(entity_t *entity);
  * @param entity Pointer to the entity structure to update.
  */
 void npcFreeMovement(entity_t *entity);
-
-/**
- * Handles interaction with an NPC entity.
- *
- * @param player Pointer to the player entity.
- * @param npc Pointer to the NPC entity.
- */
-bool_t npcInteract(entity_t *player, entity_t *npc);

src/dusk/rpg/item/CMakeLists.txt

@@ -13,7 +13,7 @@ target_sources(${DUSK_LIBRARY_TARGET_NAME}
 # Item Definitions
 dusk_run_python(
   dusk_item_csv_defs
-  tools.item.csv
+  tools.item
     --csv ${CMAKE_CURRENT_SOURCE_DIR}/item.csv
     --output ${DUSK_GENERATED_HEADERS_DIR}/rpg/item/item.h
 )

src/dusk/rpg/overworld/chunk.h

@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2025 Dominic Masters
+ * Copyright (c) 2026 Dominic Masters
  *
  * This software is released under the MIT License.
  * https://opensource.org/licenses/MIT
@@ -8,24 +8,22 @@
 #pragma once
 #include "rpg/overworld/tile.h"
 #include "worldpos.h"
-#include "display/mesh/quad.h"
-#include "display/spritebatch/spritebatch.h"
 
-// #define CHUNK_MESH_COUNT_MAX 3
+#define CHUNK_MESH_COUNT_MAX 10
-#define CHUNK_VERTEX_COUNT (QUAD_VERTEX_COUNT * CHUNK_WIDTH * CHUNK_HEIGHT * 2)
+#define CHUNK_MESH_NAME_MAX 64
 #define CHUNK_ENTITY_COUNT_MAX 10
 
+typedef struct assetentry_s assetentry_t;
+
 typedef struct chunk_s {
   chunkpos_t position;
   tile_t tiles[CHUNK_TILE_COUNT];
 
-  meshvertex_t vertices[CHUNK_VERTEX_COUNT];
+  uint8_t meshCount;
-  uint32_t vertCount;
+  char_t meshNames[CHUNK_MESH_COUNT_MAX][CHUNK_MESH_NAME_MAX];
-  mesh_t mesh;
+  vec3 meshOffsets[CHUNK_MESH_COUNT_MAX];
+  assetentry_t *meshEntries[CHUNK_MESH_COUNT_MAX];
 
-  // uint8_t meshCount;
-  // meshvertex_t vertices[CHUNK_VERTEX_COUNT_MAX];
-  // mesh_t meshes[CHUNK_MESH_COUNT_MAX];
   uint8_t entities[CHUNK_ENTITY_COUNT_MAX];
 } chunk_t;
 

src/dusk/rpg/overworld/map.c

@@ -9,6 +9,7 @@
 #include "util/memory.h"
 #include "assert/assert.h"
 #include "asset/asset.h"
+#include "asset/loader/assetloader.h"
 #include "rpg/entity/entity.h"
 #include "util/string.h"
 
@@ -17,18 +18,6 @@ map_t MAP;
 errorret_t mapInit() {
   memoryZero(&MAP, sizeof(map_t));
 
-  // Setup chunk meshes
-  for(chunkindex_t i = 0; i < MAP_CHUNK_COUNT; i++) {
-    chunk_t *chunk = &MAP.chunks[i];
-    errorChain(meshInit(
-      &chunk->mesh,
-      MESH_PRIMITIVE_TYPE_TRIANGLES,
-      CHUNK_VERTEX_COUNT,
-      chunk->vertices
-    ));
-  }
-
-  // Perform "initial load"
   MAP.loaded = true;
   int32_t i = 0;
   for(chunkunit_t z = 0; z < MAP_CHUNK_DEPTH; z++) {
@@ -52,61 +41,6 @@ bool_t mapIsLoaded() {
   return MAP.loaded;
 }
 
-// errorret_t mapLoad(const char_t *path, const chunkpos_t position) {
-//   assertStrLenMin(path, 1, "Map file path cannot be empty");
-//   assertStrLenMax(path, MAP_FILE_PATH_MAX - 1, "Map file path too long");
-
-//   if(stringCompare(MAP.filePath, path) == 0) {
-//     // Same map, no need to reload
-//     errorOk();
-//   }
-
-//   chunkindex_t i;
-  
-//   // Unload all loaded chunks
-//   if(mapIsLoaded()) {
-//     for(i = 0; i < MAP_CHUNK_COUNT; i++) {
-//       mapChunkUnload(&MAP.chunks[i]);
-//     }
-//   }
-
-//   // Store the map file path
-//   stringCopy(MAP.filePath, path, MAP_FILE_PATH_MAX);
-
-//   // Determine directory path (it is dirname)
-//   stringCopy(MAP.dirPath, path, MAP_FILE_PATH_MAX);
-//   char_t *last = stringFindLastChar(MAP.dirPath, '/');
-//   if(last == NULL) errorThrow("Invalid map file path");
-
-//   // Store filename, sans extension
-//   stringCopy(MAP.fileName, last + 1, MAP_FILE_PATH_MAX);
-//   *last = '\0'; // Terminate to get directory path
-
-//   last = stringFindLastChar(MAP.fileName, '.');
-//   if(last == NULL) errorThrow("Map file name has no extension");
-//   *last = '\0'; // Terminate to remove extension
-
-//   // Reset map position
-//   MAP.chunkPosition = position;
-
-//   // Perform "initial load"
-//   i = 0;
-//   for(chunkunit_t z = 0; z < MAP_CHUNK_DEPTH; z++) {
-//     for(chunkunit_t y = 0; y < MAP_CHUNK_HEIGHT; y++) {
-//       for(chunkunit_t x = 0; x < MAP_CHUNK_WIDTH; x++) {
-//         chunk_t *chunk = &MAP.chunks[i];
-//         chunk->position.x = x + position.x;
-//         chunk->position.y = y + position.y;
-//         chunk->position.z = z + position.z;
-//         MAP.chunkOrder[i] = chunk;
-//         errorChain(mapChunkLoad(chunk));
-//         i++;
-//       }
-//     }
-//   }
-//   errorOk();
-// }
-
 errorret_t mapPositionSet(const chunkpos_t newPos) {
   if(!mapIsLoaded()) errorThrow("No map loaded");
 
@@ -115,7 +49,6 @@ errorret_t mapPositionSet(const chunkpos_t newPos) {
     errorOk();
   }
 
-  // Determine which chunks remain loaded
   chunkindex_t chunksRemaining[MAP_CHUNK_COUNT] = {0};
   chunkindex_t chunksFreed[MAP_CHUNK_COUNT] = {0};
 
@@ -123,7 +56,6 @@ errorret_t mapPositionSet(const chunkpos_t newPos) {
   uint32_t freedCount = 0;
 
   for(chunkindex_t i = 0; i < MAP_CHUNK_COUNT; i++) {
-    // Will this chunk remain loaded?
     chunk_t *chunk = &MAP.chunks[i];
     if(
       chunk->position.x >= newPos.x &&
@@ -135,23 +67,18 @@ errorret_t mapPositionSet(const chunkpos_t newPos) {
       chunk->position.z >= newPos.z &&
       chunk->position.z < newPos.z + MAP_CHUNK_DEPTH
     ) {
-      // Stays loaded
       chunksRemaining[remainingCount++] = i;
       continue;
     }
 
-    // Not remaining loaded
     chunksFreed[freedCount++] = i;
   }
 
-  // Unload the freed chunks
   for(chunkindex_t i = 0; i < freedCount; i++) {
     chunk_t *chunk = &MAP.chunks[chunksFreed[i]];
     mapChunkUnload(chunk);
   }
 
-  // This can probably be optimized later, for now we check each chunk and see
-  // if it needs loading or not, and update the chunk order
   chunkindex_t orderIndex = 0;
   for(chunkunit_t zOff = 0; zOff < MAP_CHUNK_DEPTH; zOff++) {
     for(chunkunit_t yOff = 0; yOff < MAP_CHUNK_HEIGHT; yOff++) {
@@ -160,7 +87,6 @@ errorret_t mapPositionSet(const chunkpos_t newPos) {
           newPos.x + xOff, newPos.y + yOff, newPos.z + zOff
         };
 
-        // Is this chunk already loaded (was not unloaded earlier)?
         chunkindex_t chunkIndex = -1;
         for(chunkindex_t i = 0; i < remainingCount; i++) {
           chunk_t *chunk = &MAP.chunks[chunksRemaining[i]];
@@ -169,9 +95,7 @@ errorret_t mapPositionSet(const chunkpos_t newPos) {
           break;
         }
 
-        // Need to load this chunk
         if(chunkIndex == -1) {
-          // Find a freed chunk to reuse
           chunkIndex = chunksFreed[--freedCount];
           chunk_t *chunk = &MAP.chunks[chunkIndex];
           chunk->position = newChunkPos;
@@ -183,7 +107,6 @@ errorret_t mapPositionSet(const chunkpos_t newPos) {
     }
   }
 
-  // Update map position
   MAP.chunkPosition = newPos;
 
   errorOk();
@@ -196,7 +119,6 @@ void mapUpdate() {
 errorret_t mapDispose() {
   for(chunkindex_t i = 0; i < MAP_CHUNK_COUNT; i++) {
     mapChunkUnload(&MAP.chunks[i]);
-    errorChain(meshDispose(&MAP.chunks[i].mesh));
   }
   errorOk();
 }
@@ -216,14 +138,20 @@ void mapChunkUnload(chunk_t* chunk) {
       entity->type = ENTITY_TYPE_NULL;
     }
   }
-  chunk->vertCount = 0;
+
+  for(uint8_t m = 0; m < chunk->meshCount; m++) {
+    if(chunk->meshEntries[m] == NULL) continue;
+    assetUnlockEntry(chunk->meshEntries[m]);
+    chunk->meshEntries[m] = NULL;
+  }
+  chunk->meshCount = 0;
 }
 
 errorret_t mapChunkLoad(chunk_t *chunk) {
   if(!mapIsLoaded()) errorThrow("No map loaded");
 
   memorySet(chunk->entities, 0xFF, sizeof(chunk->entities));
-  chunk->vertCount = 0;
+  chunk->meshCount = 0;
 
   char_t name[64];
   stringFormat(
@@ -248,19 +176,43 @@ errorret_t mapChunkLoad(chunk_t* chunk) {
     return ret;
   }
 
-  memoryCopy(
+  memoryCopy(chunk->tiles, entry->data.chunk.tiles, sizeof(chunk->tiles));
-    chunk->tiles, entry->data.chunk.tiles, sizeof(chunk->tiles)
+  uint8_t meshCount = entry->data.chunk.meshCount;
-  );
+  for(uint8_t m = 0; m < meshCount; m++) {
-  chunk->vertCount = entry->data.chunk.vertCount;
+    stringCopy(
-  memoryCopy(
+      chunk->meshNames[m],
-    chunk->vertices,
+      entry->data.chunk.meshNames[m],
-    entry->data.chunk.vertices,
+      CHUNK_MESH_NAME_MAX
-    chunk->vertCount * sizeof(meshvertex_t)
     );
+    glm_vec3_copy(entry->data.chunk.meshOffsets[m], chunk->meshOffsets[m]);
+  }
   assetUnlockEntry(entry);
 
-  if(chunk->vertCount == 0) errorOk();
+  for(uint8_t m = 0; m < meshCount; m++) {
-  errorChain(meshFlush(&chunk->mesh, 0, chunk->vertCount));
+    assetentry_t *meshEntry = assetLock(
+      chunk->meshNames[m], ASSET_LOADER_TYPE_DMF, NULL
+    );
+    if(meshEntry == NULL) {
+      for(uint8_t j = 0; j < m; j++) {
+        assetUnlockEntry(chunk->meshEntries[j]);
+        chunk->meshEntries[j] = NULL;
+      }
+      errorThrow("Failed to lock mesh: %s", chunk->meshNames[m]);
+    }
+
+    ret = assetRequireLoaded(meshEntry);
+    if(errorIsNotOk(ret)) {
+      assetUnlockEntry(meshEntry);
+      for(uint8_t j = 0; j < m; j++) {
+        assetUnlockEntry(chunk->meshEntries[j]);
+        chunk->meshEntries[j] = NULL;
+      }
+      return ret;
+    }
+
+    chunk->meshEntries[m] = meshEntry;
+  }
+  chunk->meshCount = meshCount;
   errorOk();
 }
 

src/dusk/rpg/overworld/map.h

@@ -6,6 +6,7 @@
  */
 
 #pragma once
+#include "error/error.h"
 #include "rpg/overworld/chunk.h"
 
 #define MAP_FILE_PATH_MAX 128

src/dusk/rpg/rpg.c

@@ -35,6 +35,7 @@ errorret_t rpgInit(void) {
   assertTrue(entIndex != 0xFF, "No available entity slots!.");
   entity_t *ent = &ENTITIES[entIndex];
   entityInit(ent, ENTITY_TYPE_PLAYER);
+  ent->position = (worldpos_t){ 10, 2, 0 };
   RPG_CAMERA.mode = RPG_CAMERA_MODE_FOLLOW_ENTITY;
   RPG_CAMERA.followEntity.followEntityId = ent->id;
   {
@@ -48,7 +49,7 @@ errorret_t rpgInit(void) {
   entity_t *npc = &ENTITIES[npcIndex];
   entityInit(npc, ENTITY_TYPE_NPC);
   npcSetMoveType(npc, NPC_MOVE_TYPE_PATH);
-  npc->position = (worldpos_t){ 3, 3, 0 };
+  npc->position = (worldpos_t){ 8, 8, 0 };
   npc->interact.type = ENTITY_INTERACT_PRINT;
   npc->interact.data.message = "hello world";
   {
@@ -58,12 +59,12 @@ errorret_t rpgInit(void) {
     if(ci != -1) entitySetChunk(npc, (uint8_t)ci);
   }
 
-  npcpath_t *path = &npc->data.npc.moveData.path;
+  // npcpath_t *path = &npc->data.npc.moveData.path;
-  path->positions[0] = (worldpos_t){ 3, 3, 0 };
+  // path->positions[0] = (worldpos_t){ 3, 3, 0 };
-  path->positions[1] = (worldpos_t){ 10, 3, 0 };
+  // path->positions[1] = (worldpos_t){ 10, 3, 0 };
-  path->positions[2] = (worldpos_t){ 10, 10, 0 };
+  // path->positions[2] = (worldpos_t){ 10, 10, 0 };
-  path->positions[3] = (worldpos_t){ 3, 10, 0 };
+  // path->positions[3] = (worldpos_t){ 3, 10, 0 };
-  path->count = 4;
+  // path->count = 4;
 
   // All Good!
   errorOk();

src/dusk/rpg/story/CMakeLists.txt

@@ -12,7 +12,7 @@ target_sources(${DUSK_LIBRARY_TARGET_NAME}
 # Story Flag Definitions
 dusk_run_python(
   dusk_story_defs
-  tools.story.csv
+  tools.story
     --csv ${CMAKE_CURRENT_SOURCE_DIR}/storyflag.csv
     --output ${DUSK_GENERATED_HEADERS_DIR}/rpg/story/storyflagvalue.h
 )

src/dusk/scene/overworld/sceneoverworld.c

@@ -9,6 +9,8 @@
 #include "console/console.h"
 #include "assert/assert.h"
 
+#include "display/display.h"
+#include "display/displaystate.h"
 #include "display/shader/shader.h"
 #include "display/screen/screen.h"
 #include "display/shader/shaderunlit.h"
@@ -19,6 +21,9 @@
 #include "rpg/entity/entity.h"
 #include "rpg/rpgcamera.h"
 
+#include "asset/loader/assetloader.h"
+#include "asset/loader/assetentry.h"
+
 #define TEXTURE_CHUNK_SIZE 16
 
 static texture_t TEXTURE_CHUNK;
@@ -54,6 +59,10 @@ errorret_t sceneOverworldUpdate(scenedata_t *sceneData) {
 errorret_t sceneOverworldRender(scenedata_t *sceneData) {
   assertNotNull(sceneData, "Scene data cannot be null");
 
+  errorChain(displaySetState((displaystate_t){
+    .flags = DISPLAY_STATE_FLAG_DEPTH_TEST | DISPLAY_STATE_FLAG_CULL
+  }));
+
   mat4 proj, model, eye;
 
 
@@ -97,31 +106,7 @@ errorret_t sceneOverworldRender(scenedata_t *sceneData) {
   errorChain(shaderSetMatrix(&SHADER_UNLIT, SHADER_UNLIT_VIEW, eye));
 
   // Chunks
-  {
+  errorChain(sceneOverworldDrawChunks());
-    shadermaterial_t chunkMaterial = {
-      .unlit = {
-        .color = COLOR_WHITE,
-        .texture = &TEXTURE_CHUNK
-      }
-    };
-
-    uint32_t i = 0;
-    for(uint8_t x = 0; x < MAP_CHUNK_WIDTH; x++) {
-      for(uint8_t y = 0; y < MAP_CHUNK_HEIGHT; y++) {
-        for(uint8_t z = 0; z < MAP_CHUNK_DEPTH; z++) {
-          chunk_t *chunk = &MAP.chunks[i];
-          if(chunk->vertCount == 0) {
-            i++;
-            continue;
-          }
-
-          errorChain(shaderSetMaterial(&SHADER_UNLIT, &chunkMaterial));
-          errorChain(meshDraw(&chunk->mesh, 0, chunk->vertCount));
-          i++;
-        }
-      }
-    }
-  }
 
   // Entities
   {
@@ -156,6 +141,44 @@ errorret_t sceneOverworldRender(scenedata_t *sceneData) {
   errorOk();
 }
 
+errorret_t sceneOverworldDrawChunks() {
+  shadermaterial_t chunkMaterial = {
+    .unlit = {
+      .color = COLOR_WHITE,
+      .texture = &TEXTURE_CHUNK
+    }
+  };
+
+  for(chunkindex_t i = 0; i < MAP_CHUNK_COUNT; i++) {
+    chunk_t *chunk = &MAP.chunks[i];
+    if(chunk->meshCount == 0) continue;
+
+    worldpos_t wp;
+    chunkPosToWorldPos(&chunk->position, &wp);
+    vec3 wpf = { (float_t)wp.x, (float_t)wp.y, (float_t)wp.z };
+
+    for(uint8_t m = 0; m < chunk->meshCount; m++) {
+      if(chunk->meshEntries[m] == NULL) continue;
+
+      vec3 pos;
+      glm_vec3_add(wpf, chunk->meshOffsets[m], pos);
+      mat4 model;
+      glm_translate_make(model, pos);
+      errorChain(shaderSetMatrix(&SHADER_UNLIT, SHADER_UNLIT_MODEL, model));
+      errorChain(shaderSetMaterial(&SHADER_UNLIT, &chunkMaterial));
+      errorChain(meshDraw(&chunk->meshEntries[m]->data.dmf.mesh, 0, -1));
+    }
+  }
+
+  // Restore identity model so subsequent renders (e.g. entities) are
+  // not affected by the last chunk transform.
+  mat4 identity;
+  glm_mat4_identity(identity);
+  errorChain(shaderSetMatrix(&SHADER_UNLIT, SHADER_UNLIT_MODEL, identity));
+
+  errorOk();
+}
+
 errorret_t sceneOverworldDispose(scenedata_t *sceneData) {
   assertNotNull(sceneData, "Scene data cannot be null");
 

src/dusk/scene/overworld/sceneoverworld.h

@@ -28,6 +28,14 @@ errorret_t sceneOverworldInit(scenedata_t *sceneData);
  */
 errorret_t sceneOverworldUpdate(scenedata_t *sceneData);
 
+/**
+ * Draws all loaded chunks in two passes: base meshes first (shared texture,
+ * no binds between chunks), then each chunk's additional meshes.
+ *
+ * @return An error if drawing failed, or errorOk() on success.
+ */
+errorret_t sceneOverworldDrawChunks();
+
 /**
  * Renders the overworld scene.
  *

tools/asset/chunk/__main__.py

@@ -0,0 +1,318 @@
+# Copyright (c) 2026 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+"""
+Generates DCF + companion DMF files from raw chunk JSON files, or upgrades
+legacy DCF files (version 1 or 2) to version 3.
+
+JSON input (assetsraw/chunks/chunk_X_Y_Z.json):
+  {
+    "tiles": [
+      { "pos": [x, y, z], "type": <tile_shape_int>, "tile": <uv_tile_int> }
+    ],
+    "meshes": [
+      { "file": "house_5_3.dmf", "pos": [x, y, z] }
+    ]
+  }
+
+  Tiles absent from the array default to TILE_SHAPE_NULL.
+  Mesh files are located by searching under assets/meshes/ and referenced by
+  path from the assets root in the DCF.
+
+  Output DCF is derived automatically:
+    assetsraw/chunks/chunk_X_Y_Z.json -> assets/chunks/X_Y_Z.dcf
+
+Version 3 DCF format (after 8-byte header + tiles):
+  uint8_t  meshCount
+  for each mesh:
+    null-terminated string  (relative asset path to .dmf)
+    float32[3]              (x, y, z offset)
+
+DMF format:
+  Bytes 0-3:  DMF\\x00
+  Bytes 4-7:  uint32_t version = 1 (little-endian)
+  Bytes 8-11: uint32_t vertCount  (little-endian)
+  Bytes 12+:  meshvertex_t vertices[vertCount]
+              Each vertex: uv[2] + pos[3] = 5 x float32 LE = 20 bytes
+
+Usage:
+  python3 -m tools.asset.chunk              # process all assetsraw/chunks/*.json
+  python3 -m tools.asset.chunk <file.json>  # process one JSON file
+  python3 -m tools.asset.chunk <file.dcf>   # upgrade legacy DCF in-place
+"""
+
+import json
+import os
+import struct
+import sys
+
+_HERE        = os.path.dirname(os.path.abspath(__file__))
+PROJECT_ROOT = os.path.normpath(os.path.join(_HERE, '..', '..', '..'))
+ASSETSRAW_DIR = os.path.join(PROJECT_ROOT, 'assetsraw')
+ASSETS_DIR    = os.path.join(PROJECT_ROOT, 'assets')
+
+CHUNK_WIDTH      = 16
+CHUNK_HEIGHT     = 16
+CHUNK_DEPTH      = 32
+CHUNK_TILE_COUNT = CHUNK_WIDTH * CHUNK_HEIGHT * CHUNK_DEPTH  # 8192
+
+CHUNK_MESH_COUNT_MAX = 10
+CHUNK_MESH_NAME_MAX  = 64
+
+TILE_SIZE   = 4
+VERTEX_SIZE = 20
+
+TILE_SHAPE_NULL   = 0
+TILE_SHAPE_GROUND = 1
+
+FILE_MAGIC  = b'DCF'
+DMF_MAGIC   = b'DMF\x00'
+VERSION_OUT = 3
+DMF_VERSION = 1
+
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+def tile_index(x, y, z):
+    return x + y * CHUNK_WIDTH + z * CHUNK_WIDTH * CHUNK_HEIGHT
+
+
+def find_mesh(filename):
+    """Search ASSETS_DIR/meshes/ recursively for filename.
+    Returns the path relative to ASSETS_DIR (forward slashes), or None."""
+    meshes_root = os.path.join(ASSETS_DIR, 'meshes')
+    for dirpath, _, filenames in os.walk(meshes_root):
+        if filename in filenames:
+            rel = os.path.relpath(
+                os.path.join(dirpath, filename), ASSETS_DIR
+            )
+            return rel.replace('\\', '/')
+    return None
+
+
+def derive_dcf_path(json_path):
+    """assetsraw/chunks/chunk_X_Y_Z.json -> assets/chunks/X_Y_Z.dcf"""
+    base = os.path.splitext(os.path.basename(json_path))[0]
+    if base.startswith('chunk_'):
+        base = base[len('chunk_'):]
+    rel_dir = os.path.relpath(os.path.dirname(os.path.abspath(json_path)), ASSETSRAW_DIR)
+    return os.path.join(ASSETS_DIR, rel_dir, base + '.dcf')
+
+
+def write_dmf(path, vertex_bytes):
+    vert_count = len(vertex_bytes) // VERTEX_SIZE
+    buf = bytearray()
+    buf += DMF_MAGIC
+    buf += struct.pack('<I', DMF_VERSION)
+    buf += struct.pack('<I', vert_count)
+    buf += vertex_bytes
+    with open(path, 'wb') as f:
+        f.write(buf)
+    print(f'  Wrote DMF {path}: {vert_count} vertices, {len(buf)} bytes')
+
+
+def write_v3(dcf_path, tiles, mesh_names, mesh_offsets=None):
+    """Write a v3 DCF referencing the given DMF asset paths."""
+    mesh_count = len(mesh_names)
+    if mesh_offsets is None:
+        mesh_offsets = [(0.0, 0.0, 0.0)] * mesh_count
+
+    buf = bytearray()
+    buf += FILE_MAGIC
+    buf += b'\x00'
+    buf += struct.pack('<I', VERSION_OUT)
+    buf += tiles
+    buf += struct.pack('<B', mesh_count)
+    for name, offset in zip(mesh_names, mesh_offsets):
+        encoded = name.encode('ascii')
+        if len(encoded) >= CHUNK_MESH_NAME_MAX:
+            raise ValueError(
+                f"Mesh name too long (>= {CHUNK_MESH_NAME_MAX}): {name}"
+            )
+        buf += encoded + b'\x00'
+        buf += struct.pack('<3f', offset[0], offset[1], offset[2])
+    with open(dcf_path, 'wb') as f:
+        f.write(buf)
+    print(
+        f'  Wrote DCF {dcf_path}: '
+        f'version {VERSION_OUT}, {mesh_count} mesh(es), {len(buf)} bytes'
+    )
+
+
+# ---------------------------------------------------------------------------
+# JSON -> DCF + DMF
+# ---------------------------------------------------------------------------
+
+def build_terrain_verts(tiles_bytes):
+    """Generate top-face quads for every TILE_SHAPE_GROUND tile."""
+    buf = bytearray()
+    for z in range(CHUNK_DEPTH):
+        for y in range(CHUNK_HEIGHT):
+            for x in range(CHUNK_WIDTH):
+                idx = tile_index(x, y, z)
+                tile_type = struct.unpack_from(
+                    '<I', tiles_bytes, idx * TILE_SIZE
+                )[0]
+                if tile_type != TILE_SHAPE_GROUND:
+                    continue
+                fx, fy, fz = float(x), float(y), float(z)
+                uv_u0 = x / CHUNK_WIDTH
+                uv_u1 = (x + 1) / CHUNK_WIDTH
+                uv_v0 = y / CHUNK_HEIGHT
+                uv_v1 = (y + 1) / CHUNK_HEIGHT
+                for v in [
+                    (uv_u0, uv_v0, fx,   fy,   fz),
+                    (uv_u1, uv_v0, fx+1, fy,   fz),
+                    (uv_u1, uv_v1, fx+1, fy+1, fz),
+                    (uv_u0, uv_v0, fx,   fy,   fz),
+                    (uv_u1, uv_v1, fx+1, fy+1, fz),
+                    (uv_u0, uv_v1, fx,   fy+1, fz),
+                ]:
+                    buf += struct.pack('<5f', *v)
+    return bytes(buf)
+
+
+def from_json(json_path, dcf_path):
+    with open(json_path) as f:
+        data = json.load(f)
+
+    tiles = bytearray(CHUNK_TILE_COUNT * TILE_SIZE)
+    for tile in data.get('tiles', []):
+        pos = tile['pos']
+        x, y, z = int(pos[0]), int(pos[1]), int(pos[2])
+        struct.pack_into(
+            '<I', tiles, tile_index(x, y, z) * TILE_SIZE, int(tile['type'])
+        )
+
+    terrain_verts = build_terrain_verts(tiles)
+    mesh_names = []
+    mesh_offsets = []
+
+    # Terrain mesh (only written if non-empty)
+    dcf_base = os.path.splitext(os.path.basename(dcf_path))[0]
+    terrain_dir = os.path.join(ASSETS_DIR, 'meshes', 'chunks')
+    os.makedirs(terrain_dir, exist_ok=True)
+    if terrain_verts:
+        dmf_name = f'chunk_{dcf_base}_0.dmf'
+        write_dmf(os.path.join(terrain_dir, dmf_name), terrain_verts)
+        mesh_names.append(f'meshes/chunks/{dmf_name}')
+        mesh_offsets.append((0.0, 0.0, 0.0))
+
+    # External mesh references
+    for mesh in data.get('meshes', []):
+        filename = mesh['file']
+        pos = mesh.get('pos', [0, 0, 0])
+        rel = find_mesh(filename)
+        if rel is None:
+            raise ValueError(f"Mesh not found under assets/meshes/: {filename}")
+        mesh_names.append(rel)
+        mesh_offsets.append((float(pos[0]), float(pos[1]), float(pos[2])))
+        print(f'  Resolved {filename} -> {rel}')
+
+    write_v3(dcf_path, bytes(tiles), mesh_names, mesh_offsets)
+
+
+def process_json(json_path):
+    dcf_path = derive_dcf_path(json_path)
+    os.makedirs(os.path.dirname(dcf_path), exist_ok=True)
+    print(f"{json_path} -> {dcf_path}")
+    from_json(json_path, dcf_path)
+
+
+# ---------------------------------------------------------------------------
+# Legacy DCF (v1/v2) -> v3
+# ---------------------------------------------------------------------------
+
+def read_legacy_dcf(path):
+    with open(path, 'rb') as f:
+        data = f.read()
+    if data[:3] != FILE_MAGIC:
+        raise ValueError(f"{path}: not a DCF file")
+    version = struct.unpack_from('<I', data, 4)[0]
+    if version not in (1, 2):
+        raise ValueError(f"{path}: expected version 1 or 2, got {version}")
+
+    offset = 8
+    tiles_size = CHUNK_TILE_COUNT * TILE_SIZE
+    tiles = data[offset:offset + tiles_size]
+    offset += tiles_size
+
+    meshes = []
+    if version == 1:
+        vert_count = struct.unpack_from('<I', data, offset)[0]
+        offset += 4
+        verts = data[offset:offset + vert_count * VERTEX_SIZE]
+        if len(verts) != vert_count * VERTEX_SIZE:
+            raise ValueError(f"{path}: truncated vertex data")
+        if vert_count > 0:
+            meshes.append(verts)
+    else:
+        mesh_count = data[offset]
+        offset += 1
+        for _ in range(mesh_count):
+            vert_count = struct.unpack_from('<I', data, offset)[0]
+            offset += 4
+            verts = data[offset:offset + vert_count * VERTEX_SIZE]
+            if len(verts) != vert_count * VERTEX_SIZE:
+                raise ValueError(f"{path}: truncated vertex data")
+            offset += vert_count * VERTEX_SIZE
+            if vert_count > 0:
+                meshes.append(verts)
+    return tiles, meshes
+
+
+def upgrade_dcf(path):
+    print(f"Upgrading legacy DCF {path} ...")
+    tiles, meshes = read_legacy_dcf(path)
+    print(
+        f"  tiles={CHUNK_TILE_COUNT}, meshes={len(meshes)}, "
+        f"total_verts={sum(len(m) // VERTEX_SIZE for m in meshes)}"
+    )
+    base = os.path.splitext(os.path.basename(path))[0]
+    terrain_dir = os.path.join(ASSETS_DIR, 'meshes', 'chunks')
+    os.makedirs(terrain_dir, exist_ok=True)
+    mesh_names = []
+    for idx, verts in enumerate(meshes):
+        dmf_name = f'chunk_{base}_{idx}.dmf'
+        write_dmf(os.path.join(terrain_dir, dmf_name), verts)
+        mesh_names.append(f'meshes/chunks/{dmf_name}')
+    write_v3(path, tiles, mesh_names)
+
+
+# ---------------------------------------------------------------------------
+# Entry point
+# ---------------------------------------------------------------------------
+
+def main():
+    args = sys.argv[1:]
+
+    if not args:
+        chunks_dir = os.path.join(ASSETSRAW_DIR, 'chunks')
+        if not os.path.isdir(chunks_dir):
+            print(f"No directory found: {chunks_dir}")
+            sys.exit(1)
+        json_files = sorted(
+            os.path.join(chunks_dir, f)
+            for f in os.listdir(chunks_dir)
+            if f.endswith('.json')
+        )
+        if not json_files:
+            print(f"No JSON files found in {chunks_dir}")
+            sys.exit(0)
+        for p in json_files:
+            process_json(p)
+        return
+
+    src = args[0]
+    if os.path.splitext(src)[1].lower() == '.json':
+        process_json(src)
+    else:
+        upgrade_dcf(src)
+
+
+if __name__ == '__main__':
+    main()

tools/asset/dmf/__init__.py

@@ -0,0 +1,4 @@
+# Copyright (c) 2026 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT

tools/asset/dmf/__main__.py

@@ -0,0 +1,69 @@
+# Copyright (c) 2026 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+"""
+Writes DMF (Dusk Mesh Format) files.
+
+DMF format:
+  Bytes 0-3:  DMF\x00 (magic)
+  Bytes 4-7:  uint32_t version = 1 (little-endian)
+  Bytes 8-11: uint32_t vertCount (little-endian)
+  Bytes 12+:  meshvertex_t vertices[vertCount]
+              Each vertex is 20 bytes: uv[2] + pos[3] (5 floats, LE)
+
+Usage:
+  python3 -m tools.asset.dmf <output.dmf> <vertices.bin>
+  Reads raw vertex bytes from vertices.bin and writes a DMF file.
+"""
+
+import struct
+import sys
+import os
+
+MAGIC = b'DMF\x00'
+VERSION = 1
+VERTEX_SIZE = 20
+
+
+def write_dmf(path, vertex_bytes):
+    if len(vertex_bytes) % VERTEX_SIZE != 0:
+        raise ValueError(
+            f"Vertex data size {len(vertex_bytes)} is not a "
+            f"multiple of {VERTEX_SIZE}"
+        )
+    vert_count = len(vertex_bytes) // VERTEX_SIZE
+    buf = bytearray()
+    buf += MAGIC
+    buf += struct.pack('<I', VERSION)
+    buf += struct.pack('<I', vert_count)
+    buf += vertex_bytes
+    with open(path, 'wb') as f:
+        f.write(buf)
+    print(
+        f'Wrote {path}: {vert_count} vertices, {len(buf)} bytes'
+    )
+    return vert_count
+
+
+def main():
+    args = sys.argv[1:]
+    if len(args) != 2:
+        print(
+            "Usage: python3 -m tools.asset.dmf "
+            "<output.dmf> <vertices.bin>"
+        )
+        sys.exit(1)
+
+    dst = args[0]
+    src = args[1]
+
+    with open(src, 'rb') as f:
+        vertex_bytes = f.read()
+
+    write_dmf(dst, vertex_bytes)
+
+
+if __name__ == '__main__':
+    main()