Wasn't it Sebastian H. who wrote:
>Sebastian H. wrote:
>
>> problem/bug?
>
>I dug a bit in the source code and found that a
>change in fnintern.cpp fixes the problem.
>In the f_rounded_box function there is an offset
>of 1e-6 subtracted from the actual result.
>
>return (... - 1e-6);
>
>With an increased offset magnitude of 1e-3
>the problem disappears and the isosurface looks correct.
>Why this offset is there is beyond me but removing it
>slows down the isosurface rendering a lot.

I noticed that the slow down only seems to be happening with the
processing of shadows. If you add the no_shadow keyword, or move both
lights round to the front, then the isosurface renders quickly, but it
still has speckles.

-- 
Mike Williams
Gentleman of Leisure

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