Hi,

in my last image there are small artifacts, when 13 media containers meet each
other. It didn't disturb too much, because they aren't visible at smaller
scale.

Now I wanted to find a solution, but all of my usual tricks failed (hollow,
merge, max_trace_level, same ior, full transparency, samples/intervals).

IIRC clipca said, in 3.7 fully transparent objects are handled differently as in
older versions.


Now for the experts, here is a minimal scene -


#version 3.7;

global_settings {
        assumed_gamma 1
        max_trace_level 255
}

camera {
        location <0.6,2,-5>
        look_at 0
        angle 1.2
}

#declare MPipe =
material {
        texture {
                pigment {color rgbt 1}
        }
        interior {
                ior 1.0
                media {
                        emission 1
                        samples 80
                }
        }
}

#declare m = 0;
#while (m < 5)
        cylinder {
                y*-5, y*5, 0.02
                hollow
                material {MPipe}
                rotate <90,m*72,0>
        }
        #declare m = m+1;
#end

// end

Norbert

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