In article <3c750536@news.povray.org> , Warp <war### [at] tagpovrayorg>  wrote:

>   For pigments there's one trick that can be used: trilinearly-filtered
> mipmapping.

No, it won't help.  Mipmapping just moves the problem to a preprocessing stage
and in general is nearly pointless for raytracing.  Still exactly the same
problem needs to be solved, but can of course use more processing intensive
algorithms for interpolation.  That is why it is used in the first place in
one application:  To allow real-time display in a reasonable quality in CAD
previews (and today games).


    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

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