I think there’s been an iso set for a few months maybe? But recently I started making tiles for Chezzo’s set (never done it before) and he liked them and added them.
The most recent set is in build 5241 (the tiles version). Instructions on how to use it are:
[quote=“StopSignal, post:299, topic:8933”]Make sure you have the “graphical tiles” version of the game! Not the curses one.
First, in the main menu, go to Options.
With TAB, select the graphics tab. (I think it has that name)
Then, scroll down until you see “Tileset”. There, keep choosing until you see "ChestHole iso"
There it is![/quote]
Since he explains it way better than I can. 
Edit: Chezzo, I made a more generic door and some matching door frames, open doors and damaged doors and did some work lining up the blue walls, “t-wall”. Edit2: I somehow made the bowling lane guard work too.
