It's a Braun fan. Modeled mostly in Blender. The stand was also modeled in
Blender, but when I added a transparent color, rendering times became too long
(as in stuck at 0% for > 24 hours). So I remade the stand in Povray SDL instead.
Now render time is about 5 minutes. What is it about transparent meshes that
causes rendering times to slow down so much?

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