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Here are some tests of the HDRI (high dynamic range illumination) patch by
Mael.
The model is the Lego Ferrari by Kenneth Storm (see the p.b.i thread "Lego
Ferrari" on Sept 2).
The HDR maps are those available at Paul Devebec's site (I put the probes
name for reference) http://www.debevec.org
There's nothing much to it actually : just the HDR map, no lights, same
standard radiosity parameters. There are some visible artefacts in the maps
that have many strong light sources (like the Galileo probe), but the way
the HDR map seems to replace light sources is really amazing (apart the lack
of specular highlights, of course).
I still have to test it on "real" scenes though, where the illumination also
comes from regular objects. I really can't take credit for anything in these
tests ! Before I tested it, I couldn't figure out whether HDRI was really
better than plain radiosity, but it really is.
Important note : the patch is not publicly available yet (there's a Megapov
version somewhere) but I hope that Mael will release it soon.
G.
--
**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters
Post a reply to this message
Attachments:
Download 'lego_3hdrall.jpg' (194 KB)
Preview of image 'lego_3hdrall.jpg'
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Gilles Tran wrote:
> Here are some tests of the HDRI (high dynamic range illumination) patch by
> Mael.
> The model is the Lego Ferrari by Kenneth Storm (see the p.b.i thread "Lego
> Ferrari" on Sept 2).
> The HDR maps are those available at Paul Devebec's site (I put the probes
> name for reference) http://www.debevec.org
> There's nothing much to it actually : just the HDR map, no lights, same
> standard radiosity parameters. There are some visible artefacts in the maps
> that have many strong light sources (like the Galileo probe), but the way
> the HDR map seems to replace light sources is really amazing (apart the lack
> of specular highlights, of course).
> I still have to test it on "real" scenes though, where the illumination also
> comes from regular objects. I really can't take credit for anything in these
> tests ! Before I tested it, I couldn't figure out whether HDRI was really
> better than plain radiosity, but it really is.
> Important note : the patch is not publicly available yet (there's a Megapov
> version somewhere) but I hope that Mael will release it soon.
>
> G.
>
Those are sweet. Some higher resolution versions would be noce to see. :o)
-peter
--
Texturing Monk:
"Ballet pour ma fille."
http://www.applesnake.net
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Wow, those look good!
I might be misunderstanding the technique, but how do you get the coloured light
spots on the ground in the st peters image? I thought an HDR map was just based
on a photo sampled from 1 point in the environment, so your scene shouldn't be
able to get this effect, though it looks much more realistic with it :)
--
Tek
http://www.evilsuperbrain.com
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3e051083@news.povray.org...
> Wow, those look good!
>
> I might be misunderstanding the technique, but how do you get the coloured
light
> spots on the ground in the st peters image? I thought an HDR map was just
based
> on a photo sampled from 1 point in the environment, so your scene
shouldn't be
> able to get this effect, though it looks much more realistic with it :)
In fact it was a nice surprise to me too ! I didn't expect the light maps to
project light the way they do. It looks like the "hot spots" in the map act
like real lights after all (without creating specular highlights). There are
lots of artefacts here, but more testing (or a different implementation of
HDRI support) could perhaps solve them.
G.
--
**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters
Post a reply to this message
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Gilles Tran wrote:
> Here are some tests of the HDRI (high dynamic range illumination)
> patch by Mael.
They are seriously impressive - I cannot wait for the patch! - lets just
hope I can munge Moray into making it work :P
--
Rick
Kitty5 NewMedia http://Kitty5.co.uk
POV-Ray News & Resources http://Povray.co.uk
TEL : +44 (01270) 501101 - FAX : +44 (01270) 251105 - ICQ : 15776037
PGP Public Key
http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0x231E1CEA
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Gilles Tran wrote:
Hi Gilles!
> Important note : the patch is not publicly available yet (there's a
> Megapov version somewhere) but I hope that Mael will release it soon.
HDRI in POV-Ray or Megapov would be great! A view weeks ago I visited Paul
Devebec's site and decided to try this feature some day. Than I realized
that POV-Ray (well, I'm new to POV) doesn't support this feature and I
thought that I have to learn to use Radiance. Now I can't await to get a
patched version. :-)
Your test images look amazing!
Regards,
Xtra
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3e05f2a7@news.povray.org...
>
> HDRI in POV-Ray or Megapov would be great!
Be happy, I found the Megapov version here :
http://martial.rameaux.free.fr/mael/MLPov.html#Download
G.
--
**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters
Post a reply to this message
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Try painting a probe in photoshop, I found that the resolution did not have
to be very high so long as the parts of the image had natural colors and
the correct density. It may be different on POV, I used 3dMax to do it
about a year ago so the renderers are totally different.
There was one other issue I noted at the time, the HDRI source sphere needs
to be scaled correctly for the lighting to work correctly for small
objects. Try the St Peters probe again with the scale being closer to the
size ratio between that huge building and the tiny toy car.
If my words are not making any sense, tell me and I will draw what I am
thinking.
:o)
Gilles Tran wrote:
> Here are some tests of the HDRI (high dynamic range illumination) patch by
> Mael.
> The model is the Lego Ferrari by Kenneth Storm (see the p.b.i thread
> "Lego Ferrari" on Sept 2).
> The HDR maps are those available at Paul Devebec's site (I put the probes
> name for reference) http://www.debevec.org
> There's nothing much to it actually : just the HDR map, no lights, same
> standard radiosity parameters. There are some visible artefacts in the
> maps that have many strong light sources (like the Galileo probe), but the
> way the HDR map seems to replace light sources is really amazing (apart
> the lack of specular highlights, of course).
> I still have to test it on "real" scenes though, where the illumination
> also comes from regular objects. I really can't take credit for anything
> in these tests ! Before I tested it, I couldn't figure out whether HDRI
> was really better than plain radiosity, but it really is.
> Important note : the patch is not publicly available yet (there's a
> Megapov version somewhere) but I hope that Mael will release it soon.
>
> G.
>
> --
> **********************
> http://www.oyonale.com
> **********************
> - Graphic experiments
> - POV-Ray and Poser computer images
> - Posters
--
Your connection failed because: Not enough interrupts
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Do you know if this patch supports the type of "texture transfer" that is
described in the paper that is linked at the MLPov site (Image Quilting for
Texture Synthesis and Transfer
Alexei A. Efros and Willian T. Freeman)?
thanks very much,
Dennis
"Gilles Tran" <git### [at] wanadoo fr> wrote in message
news:3e0627cb@news.povray.org...
>
> 3e05f2a7@news.povray.org...
> >
> > HDRI in POV-Ray or Megapov would be great!
>
> Be happy, I found the Megapov version here :
> http://martial.rameaux.free.fr/mael/MLPov.html#Download
>
> G.
>
>
> --
> **********************
> http://www.oyonale.com
> **********************
> - Graphic experiments
> - POV-Ray and Poser computer images
> - Posters
>
>
>
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in news:3e066c02$1@news.povray.org Dennis Miller wrote:
> Do you know if this patch supports the type of "texture transfer"
> that is described in the paper that is linked at the MLPov site
> (Image Quilting for Texture Synthesis and Transfer
>
Yes it's the "Synthese Patch" section.
Ingo
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