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Re: Question about fresnel's output Kt ...

Newsgroups	comp.graphics.rendering.renderman
Date	2012-10-11 11:24 -0700
References	<0f52ba86-9a3c-4d29-81bf-048f114b1ec8@googlegroups.com>
Message-ID	<81f3560f-95fd-4a18-86e2-d24a95c46a91@googlegroups.com> (permalink)
Subject	Re: Question about fresnel's output Kt ...
From	lollipopshaders@gmail.com

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On Monday, September 17, 2012 9:00:39 AM UTC-7, Seila Ancientmoon wrote:
> hi all,
> 
> I notice that some SL examples that use fresnel() usually don't use the Kt output directly but calculating Kt from 1-Kr, why this should be done? Or any limit that fresnel can't produce a correct Kt ?

Hi Seila, good observation - this way of calculating the Kt from 1-Kr means it's not truly energy conserving. I'm not sure why its done that way, perhaps as you suggest the Kt wasn't accurate.

Christos
www.lollipopshaders.com

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Question about fresnel's output Kt ... seilaancientmoon@gmail.com - 2012-09-17 09:00 -0700
  Re: Question about fresnel's output Kt ... lollipopshaders@gmail.com - 2012-10-11 11:24 -0700

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