POV-Ray : Newsgroups : povray.binaries.images : Another HDRI image (72kbu) Server Time
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From: Apache
Subject: Re: Another HDRI image (72kbu)
Date: 6 Jan 2003 23:20:01
Message: <3e1a5571$1@news.povray.org>
Poser?


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From: Andreas Kreisig
Subject: Re: Another HDRI image (72kbu)
Date: 7 Jan 2003 07:14:56
Message: <3e1ac4c0@news.povray.org>
Apache wrote:

> Poser?

I'm sure this is a Poser model. Anyway, it looks nice!

Andreas

-- 
http://www.render-zone.com


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From: Alan Holding
Subject: Re: Another HDRI image (72kbu)
Date: 7 Jan 2003 13:08:21
Message: <3e1b1795$1@news.povray.org>
Uh huh.

Exported to obj then converted to mesh2 with 3D Win.

The sphere is a POV-Ray primitive.  :O)

"Apache" <apa### [at] yahoocom> wrote in message
news:3e1a5571$1@news.povray.org...
> Poser?


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From: Skip Talbot
Subject: Re: Another HDRI image (72kbu)
Date: 8 Jan 2003 01:17:22
Message: <3e1bc272$1@news.povray.org>
I have a question.  The HDRI used in this scene features a clear daytime
sky, right?  The scene, however, looks to be way too blue.  I know that the
atmosphere absorbs wavelengths of non-blue light and that this scene shows
the shaded side, so there should be somewhat of a blue tint.  However, isn't
light from the sky hitting shadowed objects still predominantly white?

Skip


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From: Alan Holding
Subject: Re: Another HDRI image (72kbu)
Date: 8 Jan 2003 14:43:56
Message: <3e1c7f7c@news.povray.org>
"Skip Talbot" <sta### [at] uiucedu> spake thusly via
news:3e1bc272$1@news.povray.org...
> I have a question.  The HDRI used in this scene features a clear daytime
> sky, right?  The scene, however, looks to be way too blue.  I know that the
> atmosphere absorbs wavelengths of non-blue light and that this scene shows
> the shaded side, so there should be somewhat of a blue tint.  However, isn't
> light from the sky hitting shadowed objects still predominantly white?

Attached is a low res version of the HDRI image used.

I whacked the ambient factor up to 5 for the HDRI sphere in this image and that
probably boosted the glow around the sun, hence more white than there should be
and more blue too.  However, I'm no HDRI expert so I'm probably talking bunkum.

Can anyone offer a more reasoned response?

Skip, I can send you the scene file if you like.  With the skeleton mesh and the
image it'll be about a 1MB zip file.  That OK?


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Attachments:
Download 'field_preview.jpg' (5 KB)

Preview of image 'field_preview.jpg'
field_preview.jpg


 

From: Skip Talbot
Subject: Re: Another HDRI image (72kbu)
Date: 8 Jan 2003 15:01:23
Message: <3e1c8393$1@news.povray.org>
That would be great!  Thanks Alan.

Skip


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From:  Light Beam 
Subject: Re: Another HDRI image (72kbu)
Date: 11 Jan 2003 06:11:01
Message: <3e1ffbc5@news.povray.org>
Strange, I've seen that face before...  ;-)


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From: Chad
Subject: Re: Another HDRI image (72kbu)
Date: 13 Jan 2003 12:55:05
Message: <web.3e22fc5d39bb91cb347ed4b20@news.povray.org>
Gorgeous image!

I have a different question: what setting(s) produced the shadows?  I am
fairly clueless about HDRI, but have been playing with the scene from
MLPOV--even using probe images with mostly a sigle bright area
(beach_probe.hdr, for instance) I only seem to get vague blobby hints of
shadows under objects.  Any help?

Thanks!


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From: Alan Holding
Subject: Re: Another HDRI image (72kbu)
Date: 13 Jan 2003 14:02:27
Message: <3e230d43@news.povray.org>
"Chad" <ceb### [at] druryedu> spake thusly via
news:web.3e22fc5d39bb91cb347ed4b20@news.povray.org...
> Gorgeous image!

Ta.

> I have a different question: what setting(s) produced the shadows?  I am
> fairly clueless about HDRI, but have been playing with the scene from
> MLPOV--even using probe images with mostly a sigle bright area
> (beach_probe.hdr, for instance) I only seem to get vague blobby hints of
> shadows under objects.  Any help?

If you can spare 1MB in your inbox, I can send you the scene file so you can see
for yourself.

If not...

The radiosity settings were ripped off from Andrew Cocker's settings as they're
pretty fast and give nice results. With a count of 1600, the render took about
30 minutes on my 1.3GHz 256MB XP box:

radiosity {
  pretrace_start 0.16
  pretrace_end   0.01
  count 300
  nearest_count 3
  error_bound 0.1
  recursion_limit 1
  low_error_factor 1
  gray_threshold 0.0
  minimum_reuse 0.015
  brightness 1.2
  adc_bailout 0.01/2
}

The ambient setting for the HDR sphere was whacked up to 5:

sphere {
   0,200
   pigment {image_map {hdr "field.hdr" once interpolate 2 map_type 7}}
   finish {ambient 5 diffuse 0}
   hollow on
}

And all objects were given the following finish:

finish {ambient 0 diffuse 1}

Hope this helps.

Alan.

--
http://www.manhog.nildram.co.uk/


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From: Chad
Subject: Re: Another HDRI image (72kbu)
Date: 15 Jan 2003 09:40:05
Message: <web.3e25728239bb91cb347ed4b20@news.povray.org>
Alan Holding wrote:

>Hope this helps.
>
I think this will be *very* helpful; thanks for offering the scene file too,
but I think just the settings will be enough.  Thanks!


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