BinaryAlpha TL
Author: Tony Lyons - https://www.CompositingMentor.com
Analyzes a choice of the RGB, RGBA, or Alpha input and outputs an Alpha Channel (or RGBA) that is Binary, 0 or 1. Any Pixels that are not 0 will be turned into 1 (negative numbers also), and 0 will remain 0. This is perfect for those blur + unpremult tricks or if you need a quick matte for finding any rgb color above or below 0, in a CG render passes for example. Tcl expression:
r!=0 || g!=0 || b!=0 || a! = 0 ? 1 : 0
