I made a morphing prop to help make some controlled experiments. I draw no conclusions yet - just presenting data for your perusal.

This is the prop, in its exploded morph form, showing the 5 slabs it is made of. Each slab is a welded cube topology - 8 vertices, 6 faces.

The slabs have morphs to change the width, height, and depth of the "room", the extra space outside the room covered by "floor", and the thickness of all the slabs. (And, of course, a morph to explode like this so you can see the parts.)

I have lit it from behind, so that the interior should be black or nearly so (when closed up).

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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)