On 23/02/2025 21:27, William F Pokorny wrote:

> I'll take you to mean no point of the triangles has a value >= a surface 
> of the cylinder containing the mesh.

yes

> And, you've specified an inside_vector <> in your mesh definition? One 
> NOT axis aligned (<0,0,1>) as recommended by our documentation at:
> 
>    https://wiki.povray.org/content/Reference:Mesh#Solid_Mesh

Ho yes, I tried several inside_vector without further luck.





 > Another upfront question is: Are you sure the mesh is really closed?

A very good point.
I also think the problem lies here



> Use something more random and unlikely to run near parallel with any 
> triangle's surface in your mesh (*) - there are some epsilon tolerance 
> values when testing whether inside the mesh.
> 
> Bill P.
> 
> (*)- There is too a narrow / unlikely potential bug when translating a 
> mesh with an originally valid inside_vector, which is fixed in the yuqk 
> fork.

Here, the same things rendered with yuqk* :(






* : look in p.b.programming. I have strange errors with yuqk

-- 
kurtz le pirate
compagnie de la banquise

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