Xplo Eristotle wrote:
> A post on p.b.i reminded me of something that's been bugging me for a 
> while: when using mosaic rendering, each successive pass recalculates 
> every pixel. Wouldn't it be a great deal faster to save the data and 
> only calculate color information for new pixels?

If you're doing it for preview renders, it might be nice as well have an 
option to use "solid guessing" like fractint did.  I suppose this would 
be like making the decision to render pixels on later passes or not the 
same as for AA, only render if the next one over is "sufficiently" 
different.

-josh

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