This started as a tile-painting program for making art for the game Grotto
As more features were needed, I switched to Tiled to do most work, but still use this to do light/dark analysis for rotoscoping animations to export in tiled format and finish there. I'd like to try adding new features to this tool, like cellular automata.
This code is reusable under the anti-capitalist license, except for the tileset image, which I'd prefer other people not use.