Using several povr features, tried my hand at rendering an isosurface 
cloud this afternoon. Like media, it takes some twiddling. Using +am1 
+a0.0 +r9 to force a large amount of sampling, one light for the sun and 
radiosity it took about 30 minutes on my two core, four thread i3.

How many shapes - bazillions :-).

Bill P.

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