POV-Ray : Newsgroups : povray.advanced-users : Brilliance and radiosity : Re: Brilliance and radiosity Server Time
29 Jul 2024 12:19:18 EDT (-0400)
  Re: Brilliance and radiosity  
From: Rune
Date: 21 Apr 2002 19:40:04
Message: <3cc34dd4@news.povray.org>
Christopher James Huff wrote:
> The direction of the incoming ray doesn't matter.

I meant the incoming ray to the surface of the object, i.e. the rays
that hit an object. Naturally the direction of those rays matter, more
presicely the angle of the light ray to the surface normal.

> Brilliance only uses the angle of the light ray to
> the surface normal

Exactly, and radiosity should take into account the brilliance when
dealing with this angle. How much the surface is lightened for a given
point and a given angle depends on the brilliance value used.

> what you would suggest would make it look like all
> radiosity lighting was coming from the camera.

You must have misunderstood me.

> You would have to do it for every radiosity ray,
> using the direction of the radiosity sample...

Radiosity is already currently shaded dependent on the angle of the
light ray to the surface normal, so adding support for brilliance should
not require any new information, but simply raise the influence of the
light ray to the power specified by the brilliance value.

Rune
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