Hey, estherau, thanks so much for your input, but Bagginsbill was right.  I'm developing a tool that I want to distribute, and I want it to be as easy to use as possible, so I don't want to tell the users that they have to make the prop-based controls invisible manually before rendering.  I still appreciate your help, though. :-)

EnglishBob, I am a pythonhead, so thanks for that little tidbit as well.

-digitani

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