really not used to making editors for stuff, but I think I’m blundering through pretty well:
(heres a link to a web version so you can play with what I have so far)
use the arrow keys to move the cursor, and click the tile types to alter the current tile.
didnt quite think the tile thing through, so I’ll have to have a way of having more than one plane per tile. after that I’ll be getting on to textures