>
> Thank you for your help.I am sorry to trouble you again! I want to use phong or
> radiosity (such illumination model) to calculate,how can I set relation
> statements? I have defined some paraments in global_settings {phong{}} but when
> pov is running ,it points out "phong 0".What values are these specific
> parameters should I set?
>

You cannot use phong in global_settings, this word is only defined for 
finish statement. I do not have many skills that Alain and I can't 
explain how work illumination.
In global_settings block you can defined the radiosity statement. Having 
a look at the examples (directory Povray/scenes/radiosity) can help you, 
and read the documentation for details.

Lionel.


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