ok just one thing ... when I reported about sections number I was looking the number at th bottom left of the O2 and was saying 20 ... now I've opened the sections in "Window>Resource Library" and ... my sections are 14 now !!
Furthermore that seems not to change my issue.
@ Synide ... let me read closer your explanations - suggestions and I'll come back to you.
---------- Post added at 15:12 ---------- Previous post was at 14:24 ----------
ok let me give the last status ...
points : 9471
faces : 13547
sections : 12
Regarding glass ... yes I have glasses but I haven't yet any texture applied except just the #(argb,8,8,3)color(0.0,0.0,0.0,0.12,co) in lod 0 texture area. So I'm assuming that they are treated by the game engine as normal polygons without any problems.
One more thing that I must make clear is that so far I've only a basic texture for each section without any rvmat .... is there any case that causing the problem ?
Still my issue remain ...