POV-Ray : Newsgroups : povray.advanced-users : HDR and brightness : Re: HDR and brightness Server Time
23 Jun 2024 13:45:45 EDT (-0400)
  Re: HDR and brightness  
From: Mike Horvath
Date: 24 Feb 2018 06:08:52
Message: <5a9147c4$1@news.povray.org>
On 2/23/2018 9:50 PM, Alain wrote:
> Le 18-02-23 à 13:18, Kenneth a écrit :
>> Mike Horvath <mik### [at] gmailcom> wrote:
>>> 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?
>>>
>>
>> I haven't yet used an HDRI image/image_map in a scene, but I would 
>> assume that
>> the maximum rendered brightness on-screen would be clipped to 1.0 
>> (typical
>> maximum white)-- or rather, as bright as your monitor can reproduce 
>> 1.0, just
>> like with any scene.
>>
>> The saved file is another matter, if it's saved as HDRI. (POV-Ray can 
>> do that,
>> right? I haven't read the documentation enough to know.)
>>
>>
>>
>>
>>
>>
> Yes, you can save as high dyamic range image. Just need to add +fe 
> (*.exr) or +fh (*.hdr) to the command line. Then, there is no clipping.

I wonder if it would be easier to render my sky and fluffy clouds once, 
and then include it in subsequent renders as HDRI.

Mike


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