Bigger example.

Using clouds for data.

Step detects dark parts, below a certain threshold.

I multiply that with blue - b for blue, b for below.

That which is below the threshold should be multiplied with the true case, since that was what I originally wrote, where true was "it is true we are below the crossover point".

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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)