Fandev: XMultXMult is a freeware plug in for Adobe After Effects. XMult creates an alpha channel based on the highest luminance value for each pixel. A compensation is made to the RGB channels due to the attenuation of the applied alpha channel. This is very useful for extracting a forground object filmed against a black background, e.g. explosions or fireworks. XMult supports 8, 16 & 32bpc System Requirements
