POV-Ray : Newsgroups : povray.advanced-users : HDR and brightness : Re: HDR and brightness Server Time
20 Jun 2024 23:52:42 EDT (-0400)
  Re: HDR and brightness  
From: Alain
Date: 23 Feb 2018 08:01:42
Message: <5a9010b6@news.povray.org>
Le 18-02-22 à 18:51, Mike Horvath a écrit :
> Can I achieve the same brightness using an HDRI sky as using a light 
> source? Or are there limits on how bright a scene can be?
> Mike

Yes. In fact, an HDRI sky can be TO bright, leading in an image that is 
over exposed like.

For that to work, you need to use radiosity.
Next, you can apply the HDRI to a sky_sphere or a very large sphere 
enclosing the scene.
In the case of the world sphere, it need a finish similar to :
  diffuse 0
  emission 1

If the scene is to dark, you increase the emission value, and reduce it 
if it's to bright.


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