Thank you all for the input and valuable advices. That RGBA texture with a grid sound interesting. I have thought of something similar as well, since i saw that gridwars game. I wouldnt know how to get started with that though. i will research into it and see if its doable. The nice thing is that it can be interactive with the game elements. Any pointers to where to look for it. More ideas are welcome.
Another question. When they do this in for example the visualisation in winamp, is it done on the gpu/gfxcard ?
Another question. When they do this in for example the visualisation in winamp, is it done on the gpu/gfxcard ?