In the meantime I know what/where the textures are, but what's still unclear to me is how they are referenced. I cannot find anything in the MODL/MLOD resources that would point at the wall mask (I know how all other textures are being referenced, it's just this one that's puzzling me) or elsewhere -- could some shed a little light on this?
Reason I ask is that I find it very useful for building to have doors and windows available both as one- and two-tile versions, and right now what I'm doing to make those versions involves copying the entire mesh which might be unnecessary .. seeing as I'm not changing it at all. I would like to find out whether there's a more efficient way to do this.
