Wall Auto-Tile Editor

Load walls.png (64×128, 4×4 grid). Each cell is one bitmask piece (N=1, E=2, S=4, W=8). Edit the PNG externally to change wall art.

Source Image (4x)

Click/drag to paint walls, right-click/drag to erase. Bitmask auto-tiling applied in real-time.

Click/drag = paint walls
Right-click/drag = erase
All 16 masks covered