Mike Williams wrote:

> 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.
> 

I tried a scene with many isosurface with different parameters for
f_rounded_box and found that removing the offset reduces the overall
render time for the scene by about 2%. Though "a lot" slowdown is
overestimated it is noticeable.

I have a wip scene which uses f_rounded_box a lot and unfortunately
no shadow is not an option. But thank you for the hint anyway.

Sebastian

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