vilters- Why does the bucket size have to be a power of 2? Why is 32 the best?

jura11- Just so we're talking about the same thing, by "GC", do you mean "Gamma Correction" or something else? How would gamma correction affect the smearing in an image?
Also, I'm not using any lights in my scene- all of the illumination is coming from the Ambient Value of the "Lights" materials.

And just to confuse everyone, let's throw in another condition: I need the image to render within a 1/2 hour or less.

The reason is this: if I'm going to use this technique or render settings for promotional sales images, I can't be spending 2-3 hours waiting for one image to render. If I have to make 9 or 10 images, then that's 20 to 30 hours just making images!

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