POV-Ray : Newsgroups : povray.binaries.images : More polyhedra : Re: More polyhedra Server Time
1 Aug 2024 00:19:11 EDT (-0400)
  Re: More polyhedra  
From: Alain
Date: 28 Jun 2009 12:55:10
Message: <4a47a06e$1@news.povray.org>

> "Bill Pragnell" <bil### [at] hotmailcom> wrote:
>> "Simone" <inf### [at] alienenterprisesde> wrote:
> 
>> The shadows are bright in my image because I used radiosity with a bright
>> environment, so there are no completely shadowed areas. However, if you have a
>> sphere and a single light source, a largely dark shadow with a single bright
>> spot is to be expected. It only looks odd because you don't often get that
>> lighting setup in reality.
> 
> Yes, I think I'll have to try with radiosity right from the start. First I
> thought I would try it with only a single light and without radiosity and when
> it looks halfway decent, to enhance it with radiosity and another light source.
> Because having radiosity right from the beginning is always so time consuming
> that it doesn't work well with my trial and error approach :))
> 
> Alain <aze### [at] qwertyorg> wrote:
>> Glass objects, as well as metallic ones, need some environment to look
>> good.
> Yes, I already had a plane and skysphere. I also tried to put some other
> transparent objects around and set them to no_image. It does lighten up the
> shadows of the still visible sphere, but at the same time the sphere's shadow
> starts too look dull and not colorful. And then when there is supposed to be
> only one sphere in the scene, reflections from other objects on the spere's
> surface look a little weird, too. On the other hand, if there are no such
> reflections, it looks too sterile. Simple things seem to me sometimes the most
> difficult.
> 
> However, thanks for the various advice. If I'll manage to come up with a decent
> result I'll post it here :)
> 
> 


During the initial stage, use a shadowless fill light. It's brightness 
should be kept low, normaly at less than 0.2, around 0.1.

A second light is much faster than using radiosity, and a shadowless 
light is faster than a regular one because you don't do any shadow test 
for those.

Alain


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