On 9/4/25 10:51, kurtz le pirate wrote:
> Thanks Bill for your bezier_spline prism suggestion.
> But it seems that there are also issues related to surface overlap, or 
> the artifacts come only from the use of subsurface scattering ?
> (still experimental, i know)

Thanks for posting your SSS result.

The far edge from the camera looks like artefacts I've seen the SSS 
feature. My play with it (years ago) struggled where camera rays 
traveled short distances within a shape.

The artefact in the lower right is new to me - a different look.

What version of POV-Ray are you using?

Did you see similar results with your merge{} of shapes?

I'd like to play with your scene (to the degree I can on my little 
machine), if you're willing to post it.

Bill P.

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