ABSTRACT
The Channel effects category is difficult to define. All of the effects here deal with the channels in a layer—red, green, blur, and alpha. The Arithmetic effect allows to combine channels of a layer with itself using blend modes. The Channel Combiner effect is like Arithmetic and Calculations, in that it performs these really abstract channel calculations. But we can use the Channel Combiner effect to create some extreme color and luminance changes that might be difficult—or even impossible—without it. The Minimax effect might be the Channel effect used most often. From a technical aspect, the Minimax effect looks at each pixel and forces it to become either the minimum or maximum value of the pixels in a specified radius. The Remove Color Matting effect basically does the same thing that After Effects does when using the Premultiplied option when interpreting an alpha channel.
