POV-Ray : Newsgroups : povray.advanced-users : HDR and brightness Server Time
23 Jun 2024 13:39:58 EDT (-0400)
  HDR and brightness (Message 11 to 11 of 11)  
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From: Alain
Subject: Re: HDR and brightness
Date: 24 Feb 2018 12:10:26
Message: <5a919c82$1@news.povray.org>
Le 18-02-24 à 10:46, Mike Horvath a écrit :
> On 2/24/2018 7:15 AM, Thomas de Groot wrote:
>> On 24-2-2018 13:01, Thomas de Groot wrote:
>>> On 24-2-2018 12:09, Mike Horvath wrote:
>>>> I wonder if it would be easier to render my sky and fluffy clouds 
>>>> once, and then include it in subsequent renders as HDRI.
>>> I would not do that if I were you. The fine details of the sky/cloud 
>>> structures would be lost. The resolution of the sky dome is not that 
>>> good and those images are not intended for crisp backgrounds but for 
>>> (global) illumination.
>> er.... I might contradict myself here because I may have misunderstood 
>> what you intend to do :-)
>> If you intend to build a spherical sky probe to be used as hdri/exr 
>> sky spheres in later scenes, then yes by all means, do that with a 
>> spherical camera. However, be aware of my comment above at the same 
>> time. I attach an example scene I made years ago to show what that means.
> I think that in addition to spherical HDRI formats, there are also cube 
> mapped ones. Does POV-Ray support these as well? (Cube mapping tends to 
> look nicer IMO.)
> Mike

In a way, you can use the cubic maping, but you need to rotate the image 
that is usually an upright cross sideway, then undo that rotation by 
rotating the textured box.
If it comes as 6 images, then, the cubic pattern is appropriate.

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