Cut myself short. I just said "here are a bunch of pupil dilation morphs". You may think I meant to say here are various settings of a pupil dilation morph.

No. I mean those are 5 different morphs. Not only is the pupil changing size, the distribution of fibers in the iris is being altered in different ways. The point is each of these 5 morphs could not be exactly produced from dial changes of the other 4.

In practice, only one of these is needed, but theoritically more is possible than simply changing pupil diameter.

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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)