Johann Uhrmann wrote:

> It's no complicated scene, but I was sleepless and this is the result.

Cool! Those defined edges of the density are where the camera viewplane 
is intersecting the density. It took me a while to figure that out when 
I was playing with them. A way to get rid of these is to average in a 
black (outside) to white (inside) spherical density gradient that has a 
fuzzy edge and put the camera right outside of the sphere so that no 
density is intersecting the viewplane.
-- 
Respectfully,
Dan P
http://<broken link>

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