"gadoid" <hansen at tkgate.org> wrote:
....

I may have narrowed the problem down for you.  It appears to be affected
ultimately by the size of the normals of the plane behind the spheres.

Try removing the plane normal or making it smaller and see what happens.  It
doesn't matter what normal type you have on the spheres, so it's not related
to the crackle pattern.  Whatever is causing it, the normals on the plane
appear to be getting reversed by the spheres.  For example try rendering
with "bozo 4" normal on the plane and then "bozo -4" and compare.

Hope this can help someone track down the reason or bug causing it.

-tgq

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