On Tue, 13 May 2003 17:02:50 -0400, selsek wrote:

>> On desert you can see images in the air. You know how ?
>> http://www.islandnet.com/~see/weather/graphics/photos/supmirag.gif
> 
> On hot roads too, you know...
> It's an ior gradient.
> You can easily reproduce this phnomenon in pov... and get
> max_trace_level very high. (you put boxes with progressive ior and check
> the result).
> 

	Shallow angle reflection is a different issue. A sheet of glass is
totally reflective at a shallow angle.

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