Kevin wrote:

Well Ok, doesn't quite meet the specifications.
The amount of blur doesn't increase with path length, rather it increases
with the difference in the normals of the front and back surfaces.
Makes for a pretty nice blur tho... one observation is that if you put the
blur texture on the interior then you can get unblurred reflections and
blurred refractions.

What we need to modify this code with is a function that sets the blur
amount that is related to the optical path length of the ray through that
object at whatever point it is rendering.  That way the blur amount can
vary.

I haven't a clue how to implement this.. it might require a patch.

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