Heh. I suppose from looking at so many of my posts on matmatic you might think that I favor P6, but actually I never use it at all anymore. P7 is much better. Matmatic works fine with it.

Nor do I ever use V3 anymore - I like V4 much more. Well "use" is meaningless - all I ever do is demonstrate shaders for the most part, and I do that with Simon as often as V4.

Your latest error message is one of those GIYWAPPYKWTI errors:

MATMATIC Script Error: unindent does not match any outer indentation level (SimpleShader01.mm1.txt, line 26)

In Python, indentation indicates grouping of statements into compound statements, unlike most other languages where we use curly braces. You have screwed your indentation up and it can't figure out what you mean.

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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)