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in news:41ab59ee@news.povray.org =Bob= wrote:
> Would that create the object more than once?
>
I guess so yes, although I don't see a coincident surface effect here:
---%<------%<---
#version 3.6;
global_settings {assumed_gamma 1}
camera {location <2,0,-6.0> look_at <2,0,0>}
light_source {<500,500,-500> rgb 1}
#declare S1=sphere { <0,0,0>, 1}
#declare S2=sphere { <2,0,0>, 1}
#declare S3=sphere { <4,0,0>, 1}
#declare U12=union {
object {S1}
object {S2}
}
#declare U23=union {
object {S2}
object {S3}
}
object {
U12
pigment {rgb 1}
}
object {
U23
pigment {rgb <1,0,0>}
//translate <0,1,0>
}
---%<------%<---
Ingo
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