In earlier versions of SH3D it was possible to give a room two colours by leaving the central part blank. I have noticed that this isn't possible anymore. Can we have that feature back? Or is it just me who's doing something wrong?
It's more like a bug but from my first attempts it existed on older version too.
The workaround is to create two rooms that join each other at two opposite places. If you need more details, just ask...
The first post is an example you made yourself, showing two ways of making a multi-coloured room. Maybe it's a bug caused by some form of "code regression" ? When I load that file, it doesn't display correctly anymore.