> the real blur method will often create grainy results,
> while the accuracy method won't.)

The method I posted here does not produce grainy results. There are no
jittering, and the amount of blur we need is usually small, so the steps
between samples aren't visible.

Your method was however a surprise to me. I didn't know there was an
'accuracy' available in normals. Though, my method blurs pigments, patterns,
or whole textures, not just normals.

Regards,
Hugo

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