in news:3affb136@news.povray.org Nekar Xenos wrote:

> What I'd need to know is if photon's work realistically enough to 
> test the functionality of lenses.

Works quite good. Did a few simple things like making a 'paralell' beam 
and a slide projector.

> And then there is the question
> of the exact shape of a lens and the location of it's focal point
> and how to model a lens in Pov.

Unless you want to use a-spherical lenses it's mostly simple 
sphere-sphere difference and intersection and sphere-box difference. 
You'll need to know the lens-makers formula to find the appropriate 
radii and ior for the lens.


Ingo

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