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Question about fresnel's output Kt ...
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seilaanc...@gmail.com
Sep 17, 2012, 12:00:39 PM9/17/12
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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 ?
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 ?
lollipo...@gmail.com
Oct 11, 2012, 2:24:23 PM10/11/12
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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.
> 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 ?
Christos
www.lollipopshaders.com
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