Wasn't it Richard Morehouse who wrote:
>could someone tell me why three of these  do not appear lit. 
>the "chevrons" are the same object rotated about the z axis .
>
>i will post source in povray.general

I don't believe that's the right place to be posting source.

Anyway, the code that seems to be causing the problem is in this bit:-

#declare Chlitglass2=pigment{ gradient y color_map{[0 Red*2 filter
.9][11/18 Red*2 filter .9][14/18 Yellow*2 filter .9][18/18 Yellow*2
filter .9]} scale 18}

If you remove the "*2"s then it renders correctly. 
I don't understand the details of why you see the effect you do.

-- 
Mike Williams
Gentleman of Leisure

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