Again - it seems that the prop-based works fine always, and the background-based works fine if the texture is also on a prop, even if we can't see the prop.

It also works fine if you switch before your first render and don't switch after.

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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)