Matt Giwer wrote:
> 
> "SamuelT." wrote:
> 
> > When I read this statement of yours I immediately thought of mirages. I
> > wonder if mirages are caused in part to this natural effect?
> 
>         Yes. It is a total reflection angle that is dependent upon the
> IOR of what is reflecting it. Air near the ground is hotter,
> decreasing its IOR.

 I meant to bring this up with a couple of the other comments made to this
thread and that is that it's not a reflection action that occurs rather
it is a refraction through the differing IOR's that makes the phenomenon
happen. Reflection and refraction are two different physical occurrences
and they are in most cases mutually exclusive.

-- 
Ken Tyler

See my 700+ Povray and 3D Rendering and Raytracing Links at:
http://home.pacbell.net/tylereng/index.html

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