Yes, I did try this initially but couldn't get the code working to replace the rocks (I might do this in future since someone helpfully gave me some sample code to do that)

But at the moment what the mod does instead is have a chance to spawn a fire in the middle of the room - or as close as possible. So when you have friendly fire you should still see more fires than usual.

The burning basement causes some of the rocks to be replaced with fires, maybe you can take that as a reference to make the code (sorry for the bad english) i like your mod btw

@kokeman2001 Thank you! Unfortunately that's the vanilla game code and the source code for that isn't available anywhere