[R] rgl lighting question

[Rajarshi Guha]

Hi, I'm using rgl to generate a 3D surface plot and I'm struggling to  
get the lighting correct. Currently the surface gets plotted, but is  
very 'shiny'. On rotating the view, I get to see parts of the surface  
- but overall I don't see much detail because of the spotlight like  
lighting.

I've played around with the specular, ambient and diffuse but I can't  
bring out the details of the surface. Could anybody point me to some  
examples of how to make a plain matte surface, which isn't obscured  
by specular reflections?

Thanks,

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Rajarshi Guha  <rguha at indiana.edu>
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