POV-Ray : Newsgroups : povray.programming : Speeding render times : Re: Speeding render times Server Time
7 Dec 2022 08:28:25 EST (-0500)
  Re: Speeding render times  
From: Warp
Date: 28 Aug 2013 12:00:45
Message: <521e1ead@news.povray.org>
Bald Eagle <cre### [at] netscapenet> wrote:
> If a light source is inside a light-tight object, it seems that there might be
> some way to recognize this fact with something along the lines of a bounding
> box.

light_group is designed for that purpose.

> I often see folks with issues where only a few components of a scene actually
> change, while other parts are what are "actively" being rendered.  Would it be
> possible to define "layers" - some of which would render and others wouldn't?

Even a small change can have an effect on other parts of the scene due to
shadows, reflections, refractions and radiosity.

                                                          - Warp

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