"Mr" <nomail@nomail> wrote in message 
news:web.4a9fc4204fc5d1a76ce87ead0@news.povray.org...
> Is it possible to get some already defined parameter as the value for some
> variable? My reason to ask is I would like to keep the value output by my
> exporter ...

I agree with what's been said so far and at the risk of stating the obvious 
I just wanted to check what you meant by "my exporter". If it's an exporter 
you've written then you can of course get your exporter to #declare a vector 
for the location of your light and use it in both the light_source and for 
any subsequent purposes that you wish:

#declare LPos = <x,y,z>;
light_source {LPos rgb ....

Of course, if you just mean "the exporter you're using" then this is no 
help.

Regards,
Chris B.

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