|  |  | I get clean fully visible slices.
 #version 3.8;
 global_settings {assumed_gamma 1.0 }
 #include "colors.inc"
#declare Aspect = image_width/image_height;
 camera {
  location <0, 5, -10>
  right x*Aspect
  look_at <0, 0, 0>
 }
light_source {<0, 5, -10> color White}
plane {z, 1 pigment {White*0.2}}
#declare Line = 0.015;
#declare LinePigment = pigment {Yellow+White/2}
#declare Slice = 0.1;
#declare Sphere = sphere {0, 0.5 }
#declare Box = box {<-1, 0, -1> <1, -Slice, 1>}
#declare E = 0.000001;
#for (M, -0.5, 0.5, Slice)
 intersection {
  object {Sphere}
  object {Box translate y*M}
  translate x*M*10
  pigment {Red}
 }
#end
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