On 11/21/24 22:23, William F Pokorny wrote:
> Picked up numerical noise with tiling patterns: 3, 12, 13 and 14.

Add 6, 11, 15 to the list too. I rendered the whole set to some 
different square image sizes.

I also tried the following fix to great success for pattern use:

   // If seeing numerical noise, try a TINY rotation like:
   rotate z*1e-5

Whether the rotation fix will work where the tiling pattern is used as 
part of an isosurface function will depend upon 'stuff'.

Bill P.

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