Uhm....this is not my first map. Yes, i know about texture handling. But i am to lazy to adjust each single face again, when i copied 12 floors
I always create brushes textured all over with "nodraw" (etc) and texture just visible faces, so if i copy all the floors, and select all brushes from same texture when selected a single face, i cant just apply a procedural texture, because the invisible nodraw-faces will get the same texture.
I could try using alwaysaway, but from experience i know, that it does not help very much

I created it in a short time (Without compiling, testing, loading, despairing from radiant general-industrial-structure-crash

) You see that 90% of the map is copied out of simple once build structure.
But thank you for the information, if there should be heavy texture "errors" please report them.