"Grim Reaper" <sup### [at] hotmailcom> wrote in message 
news:web.484baa224c6c80f26863987c0@news.povray.org...
>> Ambient seems to work the way I would expect it to when a colour is
>> specified...
>
> Your example works for me to, but it seems to only work when the ambient 
> and rgb
> shares rgb values, that is the red component is more than zero for both.
>

Ah I can see what you're expecting, but the Ambient setting is controlling 
how much of the light coming from the object simulates ambient lighting of 
the pigment specified. If the colour of the object has a zero red component 
then any red in the ambient lighting will have no impact. By contrast, I 
believe that the 'reflection' finish setting is independant of the colour of 
the pigment, allowing red to be reflected off a pure shiny green surface.

Regards,
Chris B.

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