diff --git a/.gitignore b/.gitignore
index 74c6a62..aaea3ac 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,7 +5,7 @@
 /*.g3a
 
 # Python bytecode
- __pycache__/
+__pycache__/
 
 # Common IDE files
 *.sublime-project
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 073a4ad..e13f1e3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,10 +22,13 @@ set(SOURCES
   src/render.c
 )
 set(ASSETS
-  assets-cg/example.png
+  assets-cg/tileset_base.png
+  assets-cg/tileset_decor.png
+  assets-cg/levels/demo.txt
 )
 
 fxconv_declare_assets(${ASSETS} ${ASSETS} WITH_METADATA)
+fxconv_declare_converters(assets-cg/converters.py)
 
 add_executable(addin ${SOURCES} ${ASSETS})
 target_compile_options(addin PRIVATE -Wall -Wextra -Os)
diff --git a/assets-cg/converters.py b/assets-cg/converters.py
new file mode 100644
index 0000000..db298ff
--- /dev/null
+++ b/assets-cg/converters.py
@@ -0,0 +1,58 @@
+import fxconv
+import re
+
+def convert(input, output, params, target):
+    recognized = True
+
+    if params["custom-type"] == "level":
+        o = convert_level(input, params)
+    else:
+        recognized = False
+
+    if recognized:
+        fxconv.elf(o, output, "_" + params["name"], **target)
+        return 0
+
+    return 1
+
+def convert_level(input, params):
+    RE_CATEGORY = re.compile(r'^\[([^\]]+)\]$', re.MULTILINE)
+
+    with open(input, "r") as fp:
+        ct = [x.strip() for x in RE_CATEGORY.split(fp.read())]
+        ct = [x for x in ct if x != ""]
+        assert(len(ct) % 2 == 0)
+
+    ct = { ct[i]: ct[i+1] for i in range(0, len(ct), 2) }
+    assert(ct.keys() == { "level", "base", "decor" })
+
+    # Read tileset
+    def tileset(desc):
+        desc = [line.strip().split() for line in desc.split("\n")]
+        assert(len(line) <= 16 for line in desc)
+
+        tiles = dict()
+        for y, line in enumerate(desc):
+            for x, chara in enumerate(line):
+                tiles[chara] = 16 * y + x
+
+        return tiles
+
+    base = tileset(ct["base"])
+    decor = tileset(ct["decor"])
+
+    level = [line.strip().split() for line in ct["level"].split("\n")]
+    height = len(level)
+    width = max(len(line) for line in level)
+
+    tiles = bytearray(2 * width * height)
+    for y, line in enumerate(level):
+        for x, tile in enumerate(line):
+            index = 2 * (width * y + x)
+            tiles[index]   = base[tile[0]]
+            tiles[index+1] = decor[tile[1]]
+
+    o = bytes()
+    o += fxconv.u16(width) + fxconv.u16(height)
+    o += bytes(tiles)
+    return o
diff --git a/assets-cg/fxconv-metadata.txt b/assets-cg/fxconv-metadata.txt
index d435d5f..9f19cbb 100644
--- a/assets-cg/fxconv-metadata.txt
+++ b/assets-cg/fxconv-metadata.txt
@@ -1,3 +1,3 @@
-example.png:
+*.png:
   type: bopti-image
-  name: img_example
+  name_regex: (.*)\.png img_\1
diff --git a/assets-cg/levels/demo.txt b/assets-cg/levels/demo.txt
new file mode 100644
index 0000000..d2cc7df
--- /dev/null
+++ b/assets-cg/levels/demo.txt
@@ -0,0 +1,25 @@
+[level]
+
+__ __ __ __ __ __ __ __ #_ #b #_ #t #_ #b #_ __ __ __ __ __ __ __ __ __
+__ __ __ #_ #_ #_ #_ #_ G_ G_ G_ G_ G_ G_ G_ #_ #t #_ #_ __ __ __ __ __
+__ __ __ Y_ Y_ Y_ G_ G_ G_ G_ G_ G_ G_ G_ G_ G_ G_ G_ G_ __ __ __ __ __
+__ __ __ R_ __ __ #_ G_ G_ #_ #_ #_ G_ G_ G_ #_ __ __ Y_ __ __ __ __ __
+__ __ #_ R_ __ __ Y_ Y_ Y_ Y_ Y_ Y_ Y_ __ G_ Y_ __ __ Y_ __ __ __ __ __
+__ #b R_ R_ #t #_ Y_ __ Y_ #_ #_ Y_ #t #_ #_ Y_ __ __ Y_ #t #_ #_ __ __
+__ R_ R_ R_ R_ R_ Y_ __ Y_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ __ __ Y_ Y_ Y_ B_ __ __
+__ R_ R_ R_ R_ R_ Y_ __ Y_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ #_ __ B_ __ __ B_ #_ __
+__ __ R_ R_ R_ __ Y_ #_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ #_ B_ #_ #b B_ B_ __
+__ __ R_ R_ R_ __ Y_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ B_ B_ B_ B_ B_ B_ __
+__ __ R_ R_ #_ __ __ __ __ Y_ Y_ Y_ Y_ #_ #_ #t #_ B_ B_ B_ B_ B_ B_ __
+__ __ __ R_ R_ #_ #t #_ #_ #_ #_ #t Y_ Y_ Y_ B_ B_ B_ B_ B_ B_ B_ __ __
+__ __ __ __ Y_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ Y_ __ __ __ __ __ B_ B_ B_ B_ __ __
+__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __
+
+[base]
+
+_ Y R G B
+#
+
+[decor]
+
+_ b t r
diff --git a/assets-cg/levels/fxconv-metadata.txt b/assets-cg/levels/fxconv-metadata.txt
new file mode 100644
index 0000000..9954e07
--- /dev/null
+++ b/assets-cg/levels/fxconv-metadata.txt
@@ -0,0 +1,3 @@
+*.txt:
+    custom-type: level
+    name_regex: (.*)\.txt lv_\1
diff --git a/assets-cg/tileset_base.png b/assets-cg/tileset_base.png
new file mode 100644
index 0000000..ddc135f
Binary files /dev/null and b/assets-cg/tileset_base.png differ
diff --git a/assets-cg/tileset_decor.png b/assets-cg/tileset_decor.png
new file mode 100644
index 0000000..77bee51
Binary files /dev/null and b/assets-cg/tileset_decor.png differ
diff --git a/src/level.h b/src/level.h
index b917765..3d334a5 100644
--- a/src/level.h
+++ b/src/level.h
@@ -11,8 +11,13 @@
 
 #include <stdint.h>
 
-/* TODO: DEMO */
-struct level {
-    int zero;
-    uint16_t colors[];
-};
+typedef struct {
+    /* Dimensions of the level (yeah no surprise right) */
+    uint16_t width, height;
+    /* Tile definitions; each tile is a dual-layer base/decoration */
+    struct {
+        uint8_t base;
+        uint8_t decor;
+    } tiles[];
+
+} level_t;
diff --git a/src/main.c b/src/main.c
index fe48660..0299af9 100644
--- a/src/main.c
+++ b/src/main.c
@@ -29,22 +29,7 @@ static bool getkey_global_shortcuts(key_event_t e)
 #define B C_BLUE,
 #define Y C_RGB(16,16,16),
 
-struct level lv_demo = { 0, {
-    _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
-    _ _ _ _ _ _ _ _ G G G G G G G _ _ _ _ _ _ _ _ _
-    _ _ _ Y Y Y G G G G G G G G G G G G G _ _ _ _ _
-    _ _ _ R _ _ _ G G _ _ _ G G G _ _ _ Y _ _ _ _ _
-    _ _ _ R _ _ Y Y Y Y Y Y Y _ G Y _ _ Y _ _ _ _ _
-    _ _ R R _ _ Y _ Y _ _ Y _ _ _ Y _ _ Y _ _ _ _ _
-    _ R R R R R Y _ Y Y Y Y Y Y _ Y _ _ Y Y Y B _ _
-    _ R R R R R Y _ Y Y Y Y Y Y Y Y _ _ B _ _ B _ _
-    _ _ R R R _ Y _ Y Y Y Y Y Y Y Y Y _ B _ _ B B _
-    _ _ R R R _ Y Y Y Y Y Y Y Y Y Y Y B B B B B B _
-    _ _ R R _ _ _ _ _ Y Y Y Y _ _ _ _ B B B B B B _
-    _ _ _ R R _ _ _ _ _ _ _ Y Y Y B B B B B B B _ _
-    _ _ _ _ Y Y Y Y Y Y Y Y Y _ _ _ _ _ B B B B _ _
-    _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
-}};
+extern level_t lv_demo;
 
 int main(void)
 {
@@ -60,8 +45,8 @@ int main(void)
     //---
 
     struct map *m = malloc(sizeof *m);
-    m->width = 24;
-    m->height = 14;
+    m->width = lv_demo.width;
+    m->height = lv_demo.height;
     m->entities = NULL;
     m->entity_count = 0;
     m->tiles = malloc(m->width * m->height * sizeof *m->tiles);
@@ -69,10 +54,9 @@ int main(void)
     for(int y = 0; y < m->height; y++)
     for(int x = 0; x < m->width; x++) {
         struct tile *t = map_tile(m, x, y);
-        uint16_t color = lv_demo.colors[y * m->width + x];
-
-        t->solid = (color == C_BLACK);
-        t->color = color;
+        t->base  = lv_demo.tiles[lv_demo.width * y + x].base;
+        t->decor = lv_demo.tiles[lv_demo.width * y + x].decor;
+        t->solid = (t->base == 0) || (t->base >= 16);
     }
 
     struct camera camera;
diff --git a/src/map.h b/src/map.h
index c17c02f..ebf755f 100644
--- a/src/map.h
+++ b/src/map.h
@@ -25,7 +25,10 @@ struct tile {
     /* TODO: Layers of objects, stuff, dynamic elements, etc? */
     /* TODO: Allow any collision shape for the tile! */
     bool solid;
-    uint16_t color;
+    /* Base layer: floor/wall pattern */
+    uint8_t base;
+    /* Decoration layer */
+    uint8_t decor;
 };
 
 /* Shape for a tile; this lives in a coordinate system whose (0,0) ends up at
diff --git a/src/render.c b/src/render.c
index ebb1099..4b3fae3 100644
--- a/src/render.c
+++ b/src/render.c
@@ -105,22 +105,11 @@ fixed_t camera_ppu(struct camera *c)
 // Rendering
 //---
 
-static uint16_t darker2(uint16_t color)
-{
-    return (color & 0xf7de) >> 1;
-}
-
-static uint16_t darker1(uint16_t color)
-{
-    int r = (color >> 11);
-    int g = (color >> 6) & 0x1f;
-    int b = color & 0x1f;
-
-    return C_RGB(2*r/3, 2*g/3, 2*b/3);
-}
-
 void render_map(struct map *m, struct camera *c)
 {
+    extern bopti_image_t img_tileset_base;
+    extern bopti_image_t img_tileset_decor;
+
     /* Render floor and walls */
     for(int row = 0; row < m->height; row++)
     for(int col = 0; col < m->width; col++) {
@@ -130,20 +119,14 @@ void render_map(struct map *m, struct camera *c)
         fpoint_t tile_pos = { fix(col), fix(row) };
         ipoint_t p = camera_map2screen(c, tile_pos);
 
-        /* TODO: render_map: use images */
-        uint16_t color_floor = darker1(t->color);
-        uint16_t color_wall = darker2(darker2(t->color));
-
-        int tile_w = c->zoom * TILE_WIDTH;
-        int tile_h = c->zoom * TILE_HEIGHT;
-        int wall_h = c->zoom * WALL_HEIGHT;
-
-        drect(p.x, p.y, p.x+tile_w-1, p.y+tile_h-1, color_floor);
-
-        struct tile *above = map_tile(m, col, row-1);
-        if(above && !t->solid && above->solid) {
-            drect(p.x, p.y-wall_h, p.x+tile_w-1, p.y-1, color_wall);
-        }
+        /* Floor/wall layer */
+        dsubimage(p.x, p.y, &img_tileset_base, TILE_WIDTH * (t->base % 16),
+            TILE_HEIGHT * (t->base / 16), TILE_WIDTH, TILE_HEIGHT,
+            DIMAGE_NONE);
+        /* Decoration layer */
+        dsubimage(p.x, p.y, &img_tileset_decor, TILE_WIDTH * (t->decor % 16),
+            TILE_HEIGHT * (t->decor / 16), TILE_WIDTH, TILE_HEIGHT,
+            DIMAGE_NONE);
     }
 
     /* Render entities */