Description
This is something we have been needing, very clearly, and I'm surprised there isn't already a ticket open for this.
I'm not all sure what the game engine can currently do, and if this is feasible at all, but it's currently quite inconvenient to not be able to rotate at least basic ground tiles (by 90°). We could save a lot of space in the editor menus and cut down on the cached pixmaps.
For tilesets like our current cave tileset, we could cut it down from our current 26 tiles to about 6... A corner tile, a top/side tile, and a middle tile, then each of those with the shell image "ammonite" variation.
Is this a blocker until slopes get implemented? 90° rotations shouldn't be reliant on them, physically... But it would probably be a lot easier to wait until we do have slopes to implement this.