What is the theory behind the Light Glow effect of "After Effects"? I wanna use GLSL to make it happen. But if I at least get closer to the theory behind it, I could replicate it.
I will answer my own question just in case someone gets to here at the same point. With more precision (actually 100% of precision) I got to the exact After Effects's glow. The way it works is:
This procedure work like After Effects for every single pixel. The other details of the Glow may be easily done after in basic procedure... things like "Glow Intensity", "Glow Threshold" and so on needs to be calibrated in order to get the same results with the same parameters.