You have the cone surface intersecting the light source
 cone { <0,1.928,0>, .182
 light_source { <0,1.928,0>
It may help if you move the light or end the of the cone just a little.
I found that if a plane intersects a light source some strange things can
happen. Sometimes little black artifacts sometimes it acts like there no light
at all.
--
Have Fun!

Post a reply to this message