"GioSeregni" <gms### [at] hotmailcom> wrote:
> well, I have a little question because I have often read about "artifact" on
> sooth_triangle but I don't understand. It is very difficult for me to translate
> technical language and figurative sayings. Now I have started translating the
> include files of my PovRay library that I interface with CAD, triangle to
> smooth_triangle.
> This wheel has black corners (two), on the right. Are these common artifacts, or
> can I fix them?
> Thanx in advanced!
> G.

I think you might be seeing the same bug that I've been seeing.

instead of pigment, try using (_BOTH_)

texture {pigment {rgb 0.1} finish {specular 0.4}}
interior_texture {pigment {rgb x*0.2} finish {emission 1}}

And see if those "corners" turn red.
If so, we're seeing the underside of those triangles, when we shouldn't.

- BW

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