If it's no trouble ... Would anyone know if this is rotating the sphere 
or just the texture in the sphere? And could you explain the light 
source and how much/many to use?
Thanks,
Mark Wright


#include "colors.inc"
#include "textures.inc"

camera {
 location <0,0.5,-5>
 look_at <0,0,0> }

light_source
     { <100,140,-300> color White }

sphere { <0,0,0>,2
 texture { Red_Marble } rotate 360*clock*y }

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