Am 29.08.2012 15:05, schrieb mathieu_r:

> - "objects which emit light by themselves (using the "emission" keyword
> in the finish; make sure to use big objects"
> What kind of objects do you recommend? Large spheres, boxes? Vertical planes?

Spheres probably give the best result; actually, the result will be 
quite similar to that of an equally large area light with the "circular" 
and "orient" keywords.


> - "a sky_sphere or bright background (giving you light from all directions)"
> Does radiosity setting interact with a bright background? (A bright background
> reflects more)

The radiosity setting interacts with a background (as defined by that 
keyword) in the sense that the background acts as a kind of light source 
(like an object with the "emission" keyword). The background won't be 
brightened up by other light from the scene though.

In that sense, POV-Ray's "background" feature can be thought of as a 
simpler alternative to the "sky_sphere" feature.

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