Replace battle maps 16 through 20 with hand-painted assets

docs/battle-map-terrain-atlas-pipeline.md

@@ -2,7 +2,7 @@
 
 ## Scope
 
-The first fifteen campaign battles now use the same hand-painted tactical map pipeline. The renderer still reads the original scenario tile coordinates and battle logic; only the map texture asset changes from flat/vector map art to low-contrast raster terrain.
+The first twenty campaign battles now use the same hand-painted tactical map pipeline. The renderer still reads the original scenario tile coordinates and battle logic; only the map texture asset changes from flat/vector map art to low-contrast raster terrain.
 
 ## Art Direction
 
@@ -32,6 +32,11 @@ python scripts/generate-handpaint-map-sample.py --map twelfth --webp-quality 90
 python scripts/generate-handpaint-map-sample.py --map thirteenth --webp-quality 90
 python scripts/generate-handpaint-map-sample.py --map fourteenth --webp-quality 90
 python scripts/generate-handpaint-map-sample.py --map fifteenth --webp-quality 90
+python scripts/generate-handpaint-map-sample.py --map sixteenth --webp-quality 90
+python scripts/generate-handpaint-map-sample.py --map seventeenth --webp-quality 90
+python scripts/generate-handpaint-map-sample.py --map eighteenth --webp-quality 90
+python scripts/generate-handpaint-map-sample.py --map nineteenth --webp-quality 90
+python scripts/generate-handpaint-map-sample.py --map twentieth --webp-quality 90
 ```
 
 ## Current Assets
@@ -51,6 +56,11 @@ python scripts/generate-handpaint-map-sample.py --map fifteenth --webp-quality 9
 - `src/assets/images/battle/thirteenth-battle-map.webp`
 - `src/assets/images/battle/fourteenth-battle-map.webp`
 - `src/assets/images/battle/fifteenth-battle-map.webp`
+- `src/assets/images/battle/sixteenth-battle-map.webp`
+- `src/assets/images/battle/seventeenth-battle-map.webp`
+- `src/assets/images/battle/eighteenth-battle-map.webp`
+- `src/assets/images/battle/nineteenth-battle-map.webp`
+- `src/assets/images/battle/twentieth-battle-map.webp`
 
 ## QA Outputs
 
@@ -82,5 +92,15 @@ python scripts/generate-handpaint-map-sample.py --map fifteenth --webp-quality 9
 - `docs/fourteenth-battle-map-handpaint-preview.png`
 - `docs/fifteenth-battle-map-handpaint-before-after.png`
 - `docs/fifteenth-battle-map-handpaint-preview.png`
+- `docs/sixteenth-battle-map-handpaint-before-after.png`
+- `docs/sixteenth-battle-map-handpaint-preview.png`
+- `docs/seventeenth-battle-map-handpaint-before-after.png`
+- `docs/seventeenth-battle-map-handpaint-preview.png`
+- `docs/eighteenth-battle-map-handpaint-before-after.png`
+- `docs/eighteenth-battle-map-handpaint-preview.png`
+- `docs/nineteenth-battle-map-handpaint-before-after.png`
+- `docs/nineteenth-battle-map-handpaint-preview.png`
+- `docs/twentieth-battle-map-handpaint-before-after.png`
+- `docs/twentieth-battle-map-handpaint-preview.png`
 
 Browser screenshots are saved per verification run after build/deploy.