capricorn
Thanks for the information. I definitely want to spend some time studying up on GLSL. I've got a handle on the basics now, sending variables to the shader, accessing built in variables, recoloring in fragment and positioning in vertex.

[color=#1C2837]

[color=#B57438]Eric Lengyel

The description of that chapter sounds promising. I went and made a motion blur on my own that involves writing to a lower resolution frame buffer, that's faster than accum buffer but still too slow for my needs. I'll have to take a look at that book as it seems closer to what I'd like to do.
I understand the concepts. Calculate a vector based on previous/next fragment positions and blur accordingly. Like most stuff I get hung up on the maths behind it. I've been programming for over 20 years right now, from Apple II to Flash to recently C and have made everything from arkanoid clones to web based image processors but I never seem to get better at math .