The bibs (dirt slabs under buildings) as they appeared in prerelease versions of the game.
The actual tiles used for these prerelease bibs, called SR1.TEM and SR2.TEM, accidentally remained behind in the original game's Temperate theater archive. However, not a single reference to their existence remains inside the source code.
Well, it seems the Remaster development team extracted these tiles along with all the others and shipped them off to Lemon Sky, because remastered versions of them are present inside the Remaster's files. So, at the suggestion of Chad1233, I made it into a mod. Including classic graphics based on the original tiles, of course.
This mod only modifies the bibs in Temperate and Winter theater; no graphics for this type of bibs for Desert theater were ever found.
Be aware that the top row of the bib is invisible because of this mod. Since the mod only modifies graphics, not game behaviour, these cells are still not buildable area, even if they look usable on buildings like the Repair Facility.