> How to create an effect of looking at to the scene behind a colored filter ?
> Assume that you have a red (or, green, or blue etc) colored glass and you
> are looking at a scene behind this red glass. You'll see white object as
> red, green objects as black, etc. etc. How to create this physical/optical
> effect in OpenGL?
If you want a red, green or blue filter over the entire screen, you
can use the write masks to do it.
ie: red filter is glColorMask(GL_TRUE,GL_FALSE,GL_FALSE,GL_TRUE);
(you can use the color write masks to provide depth-cues with red-blue