POV-Ray : Newsgroups : povray.text.scene-files : Ringworld scene : Re: Ringworld scene Server Time
21 Apr 2024 04:23:07 EDT (-0400)
  Re: Ringworld scene  
From: Alain Martel
Date: 11 Feb 2021 11:12:24
Message: <60255768$1@news.povray.org>

> On 2/9/2021 2:36 AM, Thomas de Groot wrote:
>> I wonder if at that distance an area_light is really effective. A 
>> point light (with parallel) would probably be much faster and without 
>> any visual difference.
> The area light is necessary to create the fuzzy shadows. (Otherwise 
> shadows would have a sharp edge and the lighted regions would be larger 
> than the shadow regions IIRC.)
> A 6x6 area light may be excessive though. Dunno.
> Mike
If using adaptive, that 6x6 become 9x9.

As for using parallel... That would only work for a small part of the 
ring.  parallel can't be used when the light_source is surrounded by 
shadow casting elements.

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