Ok next #%&*$# #%&*$#!!!
Surface `SurfaceXX` Not all texture points set for polygone # XXXX
I've tried heal vertex map but with no effect. No problem in LW only the converter refuses the work. Now I really remember this whole #%&*$#!
But two years ago I was able to fix such things, at the moment I have no clue about those errors anymore.
I only used four already existing polygones from the floor (surface 15 and surface 45) and made an UV-map for the bottom plate.