The tile list in the tilemap section is a palette of pictures: each tile shows its lone tile (the four convex corners for floor and wall, the picture itself for none) with its name below, laid out with the image-picker grid (#139)

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/core/tile.test.ts

@@ -14,6 +14,7 @@ import type { TileAsset } from '../../src/core/model/Asset';
 import { isPlaceableType } from '../../src/core/model/AssetTypes';
 import {
   autotileCombinations,
+  loneTileQuadrants,
   type Neighbours,
   neighboursAt,
   SAMPLE_PATTERN,
@@ -249,6 +250,28 @@ describe('autotile blocks', () => {
     expect([corner.n, corner.e, corner.ne]).toEqual([true, true, false]);
     expect(tileQuadrants('floor', corner)[1]).toEqual({ x: 3, y: 0 });
   });
+
+  it('shows each kind in the palette as its lone tile, the four convex corners (#139)', () => {
+    expect(loneTileQuadrants('floor')).toEqual([
+      { x: 0, y: 2 },
+      { x: 3, y: 2 },
+      { x: 0, y: 5 },
+      { x: 3, y: 5 },
+    ]);
+    expect(loneTileQuadrants('wall')).toEqual([
+      { x: 0, y: 0 },
+      { x: 3, y: 0 },
+      { x: 0, y: 3 },
+      { x: 3, y: 3 },
+    ]);
+    // A plain tile is its picture as it is, each corner its own quarter.
+    expect(loneTileQuadrants('none')).toEqual([
+      { x: 0, y: 0 },
+      { x: 1, y: 0 },
+      { x: 0, y: 1 },
+      { x: 1, y: 1 },
+    ]);
+  });
 });
 
 describe('tile asset', () => {

tests/editor/image-grid.test.ts

@@ -28,6 +28,19 @@ describe('gridMetrics', () => {
     expect(gridMetrics(140, 1).tile).toBe(TILE_MAX);
   });
 
+  it('takes other limits for the tile size, as the tile palette of a tilemap does (#139)', () => {
+    const sizes = { min: 56, max: 72 };
+    // A 300 px inspector column: four boxes of 56 fit, spread to 70 each.
+    const m = gridMetrics(300, 5, 6, sizes);
+    expect(m.columns).toBe(4);
+    expect(m.tile).toBe(70);
+    expect(m.rows).toBe(2);
+    expect(m.height).toBe(2 * (70 + CAPTION_HEIGHT) + 6);
+    // 170 px hold two columns of 82 – capped at the upper limit, not at the picker's.
+    expect(gridMetrics(170, 5, 6, sizes).tile).toBe(72);
+    expect(tileAt(tileRect(1, m, 6).x + 2, 2, 5, m, 6)).toBe(1);
+  });
+
   it('reports the height the scroll container has to give it', () => {
     const m = gridMetrics(WIDTH, 7);
     expect(m.rows).toBe(2);