Re: Fresnel effects -- plugin tool 2004-01-20 - By steven_mcq
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--- In Carrara@(protected), nospam2 <nospam2@(protected)> wrote:
> Apart special effects in shaders (such as faking an electronic
microscope) I never quite understood the reason there would be a
need for Fresnel add-on for ordinary photorealistic renderings.
If you remember from high school physics lab, as the angle of
incidence for a beam of light is adjusted from straight down to
glancing, the proportion of light reflected and the proportion
refracted changes until reaching the angle of extinction, a shallow
angle where all light from the directed beam is reflected and none
passes into the material. That is the Fresnel effect, and without
it, transparency, reflectiona and refraction don't look realistic.
SMcQ
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