Hi,

Does POV-Ray 3.5 support fresnel reflections and is there a keyword to 
activate this?

Regards,
Andreas

-- 
http://www.render-zone.com

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Please read the documentation first:
http://www.povray.org/documentation/view/187/

When adding the fresnel keyword, the Fresnel reflectivity function is used
instead of standard reflection. It calculates reflectivity using the
finish's IOR. So with a fresnel reflection_type an interior { ior IOR }
statement is required, even with opaque pigments. Remember that in real life
many opaque objects have a thin layer of transparent glaze on their surface,
and it is the glaze (which -does- have an IOR) that is reflective.

Bye,
Rene
--
Rene Schwietzke
r.schwietzke<at>reneschwietzke.de
http://www.rene-schwietzke.de/

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Rene Schwietzke wrote:

> Please read the documentation first:
> http://www.povray.org/documentation/view/187/
> 
> When adding the fresnel keyword, the Fresnel reflectivity function is used
> instead of standard reflection. It calculates reflectivity using the
> finish's IOR. So with a fresnel reflection_type an interior { ior IOR }
> statement is required, even with opaque pigments. Remember that in real
> life many opaque objects have a thin layer of transparent glaze on their
> surface, and it is the glaze (which -does- have an IOR) that is
> reflective.


Hi Rene,

Thanks for your quikly response. I just checked the 'table of contents' list 
in the docs and didn't find anything about fresnel, so I asked. :)

Andreas


-- 
http://www.render-zone.com

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My pleasure. The Windows help version is quite good...you can search, browse
by keyword and much more.
--
Rene Schwietzke
r.schwietzke<at>reneschwietzke.de
http://www.rene-schwietzke.de/

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