Man, I need to do some "blog-posting" on this one right now...

See the attached scene? That's micronormals-based blurred reflections 
(with a lousy 10 averaged textures) combined with scattering media. 
That's a good recipe for /ugly/ render times: It took beta.34 a bit over 
50 minutes worth of CPU time on my Linux machine (not to speak of 3.6, 
which took over 60 minutes wall clock time).

I just managed to cut that down to less than 25 minutes of CPU time with 
a patch.

Boy, I love it when render times crumble...!


Other scenes combining averaged or pattern-mapped textures with media 
will likely benefit, too (though possibly not to such an extreme).

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