Warp wrote:
> It means, AFAIK, that if the current pixel color differs 30% or more from
> any of the neighbour pixels, then antialiasing is performed to that pixel
> (by shoothing more rays).

Actually those 30% are misleading.  The criteria is if 
Colour_Distance_RGBT() is larger than the aa threshold and 
Colour_Distance_RGBT() calculates the L1 norm of the difference between 
the pixel colors.

Christoph

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