[Turbo_pascal]

It workst!, thank you very much.

I like so much this program, is very easy to learn, i was able to shape a lot things after watching a short 10 minutes tutorial video, it is very productive.

Edit:
Still I have a litle issue, backface are now invisible, i can see inside the room, however backfaces still can be selectable when clicked from behind; that mean i unable to select visible triangles, see the pic:

any way to dissable to select back faces?

see ya!,