POV-Ray : Newsgroups : povray.binaries.images : OMG - it works!! : Re: OMG - it works!! Server Time
1 Aug 2024 10:18:28 EDT (-0400)
  Re: OMG - it works!!  
From: Samuel Benge
Date: 29 Dec 2008 15:35:01
Message: <web.4959339e5b5ba55bf8e75d050@news.povray.org>
"clipka" <nomail@nomail> wrote:
>
> Different code though - but not at all optimized for this scene. Just some
> changes I thought would be good. I guess they are...

Hey clipka (and everyone else who might be interested),

There's a quick workaround for 3.7 radiosity. 3.7's radiosity doesn't seem to
like high count values, so to get more detail you can apply a small-scale
global surface normal to all objects in your scene like so:

#default{
 finish{ambient 0}
 normal{bumps .25 scale .001}
}

You can now get away with lower (<300) count settings. It's a hack--I admit
it--but it's worth it for difficult scenes. This works just fine with custom
pretrace_start/end and low error_bound settings as well. You'll need good
antialiasing settings to go along with it:

+a0.1 +am2 +r3

Objects which require their own surface normals can be specified in the usual
manner. Try it! This method works best where sharp point lights are not
involved, since the global surface bumping will try to visually reassert itself
at any given opportunity. I can't remember where this method came from. I hope
this helps somebody!

Sam


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