I couldn't decide what the control prop itself should look like when rendered, since it really isn't part of a scene. I was even toying with the idea of making the prop look like the letters V S S. Right now the prop is just a sphere. The geometry of the prop is irrelevent, and in fact you can make a control prop out of anything at all. Even a figure.

If you want to change the rendering of the prop, you can. Open the group editor tool, add a group, select all the polygons into the group, then click the assign material button. Choose one of the template materials to be assigned to the prop as a whole. Or you could choose a subset of the polygons and assign different templates to different parts of the prop. Then you can render the prop directly and see what the materials look like.
 

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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)