This is an excellent little tool! I was actually trying to convince a friend of mine to write something like this for me to use, but alas, that did not work lmao. I have been using a different tool for a number of years to produce first person images like this, except it is incapable of rendering separate image files for each wall, which is rather annoying. Your tool is much nicer in that it spits out each wall tile separately, and you can customize shapes. Thank you for this. You da best.
Perhaps is there a way to add the option to disable the fog entirely? Or to rescale the Floor/Ceiling textures in the same manner that you can with the Objects? Again, fantastic work :)