How do I punch out windows

Thanks very much for pointing me to that thread.That is what I am looking for.

I am trying to make a cab for my steam engine and am trying to figure out how to make a clean hole in the sides of the cab for windows.I have tried using a cube the size of the window and using the subtraction tool,but if I make more than 1 window in the cab side it messes up the faces of the side panel..Is there a better way to do this?

Using transperacy in the texture is a well tested way that does not mess up any faces and does not waste polygons.

/Anders

Or see [img:2w5pfbhq]http://amabilis.com/forumattachments/a/tpc/f/8846020084/m/55010967441/p/1[/img:2w5pfbhq]
this
thread

Regards
Gerrit