Another thought on "blur": some sort of blur_limit would be needed,
otherwise two blurred shiny objects would spawn exponential showers of rays.
(The perturb-and-antialias kludge does not have this problem.)



A demo of the kludge, which renders nicely at +A0.1 +AM2 +R3, and very
smoothly indeed at +A0.05 +AM2 +R4:

#include "colors.inc"

camera {
  location <0, 7, -14>
  direction <0, 0, 1.8>
  look_at <0, 0, 0>
}

light_source { <50, -200, -100> colour Gray70 }
light_source { <-20, 40, -20> colour Gray70 }
light_source { <100, 80, -200> colour Gray70 }

background { color MidnightBlue }

  #include "colors.inc"


          sphere {<-4,0,0>, 3  /*misty sphere*/
                pigment{color rgb 0.9}
                finish{reflection 0.3 phong 0.2 phong_size 0.1}
                normal{bozo 0.01 scale 0.00001}

            }
          sphere {<4,0,0>, 3   /*shiny sphere*/
                pigment{color rgb 0.9}
                finish{reflection 0.3 phong 0.2 phong_size 0.1}


            }
           plane{<0,1,0>, -3 pigment{checker color Red color White}}


-Robert Dawson

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