About the third point you can have a look at trace exemple in 
scenes/languages.

Oleguer




news:web.43d26b0828974d5c5a8ded0@news.povray.org...
> Hi, for everybody.
>
> 1. As anew user in the PovRay, I want to know how can i debbug my plan, 
> and
>   where can i see the results of any step in the plan.
> 2. How can i enter PovRay from matlab a height map. or a height map that 
> is
>   composed of lots of boxes.
> 3. How can i use the trace function. i need a simple example to know how 
> to
>   use it.
> 4. As new user, I need a detailed enplanation.
> 5. lots of thanks.
>
> shimon
>
>
>
>

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