People who worked with Doom Builder know that default textures are "STARTAN", "CEIL1_1" and "FLOOR0_1". This mod will show you how every classic Doom level looks like with this pack of textures (and with few more textures like doors, lifts and damaging liquids)
After posting beta screens from this mod to the Doomworld's thread "Is STARTAN2 ruined forever?" I've got a good feedback from users, so I decided to finish my little "tweak" as fast as possible.
Requires latest ZDoom/GZDoom (from 1.9)/Zandronum source ports.