Thanks for all the suggestions everyone. So far nothing has worked. I tried 
a bunch of other objects and they all seem to work ok. I guess I'll come 
back to this sometime, but for now the cone doesn't seem to want to 
cooperate. Lots of other shapes will make this scene work and I'll post it 
when I'm satisfied with the composition.

-- Dave

"NetDave" <new### [at] netdavecom> wrote in message 
news:46edc6c0@news.povray.org...
> I'm sure this is a frequent problem, but I just can't find the information 
> in the documentation. I'm rendering this scene with photons and as you can 
> see in the attached image the returning rays through the cone are coming 
> back as speckles. I've tried some of the photon settings with no success. 
> Thanks for any suggestions.
>
> -- Dave

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