scott schrieb:

> That's what I don't understand, Fresnel should determine the reflection 
> % based on the IOR and the angle, nothing else, I don't get what the 
> other two parameters do in this cae, or what I should set them to.  I 
> just use reflection{1 fresnel on} for now - I hope that is physically 
> correct.

To get physically correct results (well, as close as you get with 
POV-Ray's "fresnel" feature), it should be:

     reflection { 0, 1 fresnel on }

though for convenience the syntax

     reflection { MAX fresnel on }

is interpreted as:

     reflection { 0, MAX fresnel on }

so the syntax you use does work as well.

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