Am 08.11.2012 04:08, schrieb taftj:

> Thank you- that did work, but apparently I'm still not understanding something
> because when I remove the light source I see blackness.  I thought the point of
> radiosity was that there was some "general" light without needing a specific
> light source.

No, the main point of radiosity is that shadows are illuminated by 
diffuse light from other objects.

A side effect of radiosity is that you /can/ also get illumination from 
a sky sphere or background (this is automatic), and even objects (this 
requires a suitable finish setting; previously this could be done by 
using a non-zero "ambient" finish term, but this was originally just a 
hack and has always been troublesome, so as of POV-Ray 3.7 the new 
"emission" term needs to be used instead).

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