Yeah you're probably right.

I could write a book on this stuff. It is endlessly fascinating and so useful. People wonder why i can make shaders so fast with complex stuff. It's because I know these functions inside and out.

Here's a really really good edge detector.

Gain(Clamp(Clamp(10 * (x - .1)) - Clamp(10 * (x - .2))), .99)

I use this to make lip liner from the lip mask.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)