Le_Forgeron <jgr### [at] freefr> wrote:

>
> I do not know.
>
> Maybe by choosing something different from tessel. (try tesselate ?)

Yes. The artifact is present

> Raise the offset to something like half the width of a slice ?

The artifact is present

> Hide the artefact with a higher number of slices ?

The artifact is present

> Indeed, cubicle  might be better suited for a cube.

I didn't study cubicle
Probably, it is necessary to construct triangles correctly?
I will try.

Next:

#version 3.7;
global_settings {
    assumed_gamma 1.0
    max_trace_level 3
}
background {rgbt<0.509, 0.509, 0.509, 0>}
#declare Modul = texture
{pigment{image_map{"/home/leonid/blender/textures/grid.jpg"}}}
#declare Material_tex = texture {pigment{rgb 0.8}}
#declare Cube_ob =
mesh {
triangle {<-1,1,1>,<-1,1,-1>,<-1,-1,-1>}
triangle {<-1,1,-1>,<1,1,-1>,<1,-1,-1>}
triangle {<1,1,-1>,<1,1,1>,<1,-1,1>}
triangle {<1,1,1>,<-1,1,1>,<1,-1,1>}
triangle {<-1,-1,1>,<-1,-1,-1>,<1,-1,1>}
triangle {<1,1,1>,<1,1,-1>,<-1,1,1>}
triangle {<-1,-1,1>,<-1,1,1>,<-1,-1,-1>}
triangle {<-1,-1,-1>,<-1,1,-1>,<1,-1,-1>}
triangle {<1,-1,-1>,<1,1,-1>,<1,-1,1>}
triangle {<-1,1,1>,<-1,-1,1>,<1,-1,1>}
triangle {<-1,-1,-1>,<1,-1,-1>,<1,-1,1>}
triangle {<1,1,-1>,<-1,1,-1>,<-1,1,1>}
inside_vector <1,1,1>
}

roll {
    original Cube_ob
    albinos
    direction <1000,0,0>
    maximal 300.0
    minimal 0.2
    modulation { Modul }
    origin <2,2,2>
    texture{Material_tex}
}

light_source {
    <4.08,5.9,-1.01>
    color rgb<1, 1, 1>
}
camera {
    location  <0, 0, 0>
    look_at  <0, 0, -1>
    right <-1.6077777759896383, 0, 0>
    up <0, 1, 0>
    angle  49.134343
    rotate  <-27.098163, 46.688390, -0.903519>
    translate <7.481132, 5.343666, 6.507640>
}

The cube wasn't deformed
On the image result of a render and texture of modulate

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