Microsoft Paint used as a ‘monitor’ to run Doom at up to 35 fps, project released by firm’s Azure CTO — runs actual Doom engine and loads real shareware DOOM1.WAD

Another day another Doom port, but the new DoomPaint stands out from the crowd for a few reasons. Firstly, it has been developed by Mark Russinovich, the Microsoft Azure CTO. Secondly, DoomPaint runs the actual original shareware Doom release using MS Paint as the monitor or viewport for in-game action. That’s different, and it is remarkable to read that the OLE clipboard hack behind this latest Doom escapade allows the game to run at a fair pace, up to 35 FPS, but might also sometimes be “spreadsheet-tier,” according to the author.

“The actual Doom engine (ViZDoom) runs the real shareware DOOM1.WAD — with the BSD-licensed Freedoom WADs covering the episodes shareware doesn’t ship — and renders headlessly,” explains Russinovich on the project GitHub page. “Every frame is placed on the Windows clipboard and pasted into Paint’s canvas as a genuine document edit.” The Microsoft CTO adds that the relatively low frame rate “is part of the charm” of DoomPaint, but 35 FPS isn’t bad, if you can make it, especially in 1990s PC gaming terms.