Hi, I need to project a certain rectangle/quadrangle with a videobeamer. It is a distorted and non 4:3 area. I wonder if it possible to render the gembuffer into such a polygon. The rest of the screen should remain black. So I know how to render images and videos into that area, but I didn't find an easy solution to texture/snap the whole gemwindow into that rectangle. I would like to have some particle effects. the only way I can think of is using single buffer mode and pix_snap a buffer, then clear it and then texture onto my polygon. Do you have other ideas? thank you. marius.