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Using "blob"

Using blob

POV-Ray 3.5 source blob.pov:

#include "colors.inc"

global_settings { assumed_gamma 1.5 }

background{ White }

camera {
    angle 21 up y right 2*x
    location <0,2,-10>
    look_at <0,0,0>
}

light_source { <10, 20, -10> color White }

blob {
    threshold .6
    sphere { <.5,0,0>, .8, 1.1 pigment {Blue} scale <  1,2.2,1> }
    sphere { <-.5,0,0>,.8, 0.9 pigment {Red}  scale <1.2,  1,1> }
    finish { phong 1 }
}

sphere { <.5,0,0>, .8
    pigment { Yellow transmit .75 }
}

sphere { <-.5,0,0>, .8
    pigment { Green transmit .75 }
}