> One explanation
> might be that rays from there to the light source ignore light_group
> issues.

On a second thought: That explanation would imply that rays from a
surface to a light_source are brightened by scattering media, which
is not true and should not be true.


-- 
merge{#local i=-11;#while(i<11)#local
i=i+.1;sphere{<i*(i*i*(.05-i*i*(4e-7*i*i+3e-4))-3)10*sin(i)30>.5}#end
pigment{rgbt 1}interior{media{emission x}}hollow}//  Mark Weyer

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