I'm writing an opengl TV broadcast "game" that has some transparent elements in it. The game will be overlayed over the video by sending an alpha key map to the external video mixer. The alpha key is a grayscale rendering of the game scene using the alpha values of each pixel. I plan to render the alpha key map in a split screen layout using one window, to avoid syncronisation problems.
Is there an easy way to generate this alpha key map from my opengl scene?
[This message has been edited by hcatry (edited 11-21-2003).]
[This message has been edited by hcatry (edited 12-08-2003).]