Xns### [at] povrayorg...

> Yes it's the "Synthese Patch" section

Btw, I've tested this feature too. It works, but it's a little disappointing
: it's OK for small maps made of smaller maps, like those in the examples,
but computing a not very large map (1200*1200) took several hours on my P4
and getting a "synthese" map right requires a lot of trial and error. There
goes my hope of creating 4000*4000 realistic wall and bark maps out of
500*500 samples...

G.


--

**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters

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"Gilles Tran" <tra### [at] inapginrafr> wrote in message news:3e0746c0$1@news.povray.org...
> Btw, I've tested this feature too. It works, but it's a little disappointing
> : it's OK for small maps made of smaller maps, like those in the examples,
> but computing a not very large map (1200*1200) took several hours on my P4
> and getting a "synthese" map right requires a lot of trial and error. There
> goes my hope of creating 4000*4000 realistic wall and bark maps out of
> 500*500 samples...

Ahh....

I was going to try that too. But now I'll not bother.

All the best,

Andy Cocker

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in news:3e0746c0$1@news.povray.org Gilles Tran wrote:

> Btw, I've tested this feature too. It works, but it's a little
> disappointing ...

I like it a lot, but the results depend a lot on the input material.

Actually, I think it would be more usefull as a little stand-alone 
application, instead of a pov-patch.


Ingo

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Gilles Tran wrote:

> 

> 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

Thanks Gilles.

Do I need MegaPov 0.7 *and* POV-Ray 3.1 in order to work with this patch?

Thanks & Regards,
Andreas

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

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"Andreas Kreisig" <ank### [at] gmxde> wrote in message news:3e077929@news.povray.org...
>
> Do I need MegaPov 0.7 *and* POV-Ray 3.1 in order to work with this patch?

Just 3.1 (might be possible without, but I tried it with 3.5 and it complained about
not
having HOME variable set)

All the best,

Andy Cocker

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Is there a way to coerce POV-Ray 3.5 into doing this without the patch?
Perhaps a pre-processing step on the HDR image and then the appropriate
radiosity parameters?

JP

"Gilles Tran" <git### [at] wanadoofr> wrote in message
news:3e04e8bf@news.povray.org...
> 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
>
>
>
>

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Thanks Gilles, 
Yesterday on the #chan povfr with Dr_peer I  
had not understood how work 
with the rounded  map  ......


blatant #difference pov3.5 and mlpov
http://cathemline.org/z/teste/hdri.html 
convert in tga for pov3.5 with hrdshop

I have a yen to take again my povbouf !

--
Martial

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> Just 3.1 (might be possible without, but I tried it with 3.5 and it
complained about not
> having HOME variable set)
No  it'nt possible without 3.1 !
put mlpov.exe in the bin repertory !

--
Martial

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Something more complex than mapping the image to a sky sphere?
Such as converting the image to an array of light sources distributed over a
sphere? There are examples of both pixel data to object conversions and
spherical distribution of objects, you will need to look through the older
news post to find them, both are in the last 6 months.
There is also a Lighting inc that could be upgraded to perform such
lighting.

John Pallett wrote:

> 
> Is there a way to coerce POV-Ray 3.5 into doing this without the patch?
> Perhaps a pre-processing step on the HDR image and then the appropriate
> radiosity parameters?
> 
> JP
> 
> "Gilles Tran" <git### [at] wanadoofr> wrote in message
> news:3e04e8bf@news.povray.org...
>> 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: Lightning strikes.

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That's a good idea - though I'd hate to think of the number of lights
created for a 1024x768 image... :)

I'm wondering if there's a way to crank up the ambient value of the sky
sphere, perhaps after darkening the 'dark' parts of the image, so that the
end result is an approximation of an HDR radiosity solution.  Right now when
I use a sky sphere, it gives a nice effect, but the effect is too subtle.

Perhaps adjusting the contrast (keep the bright parts bright, darken the
rest) of an image, then setting its ambient value to 10, would do the trick
and could simulate an HDR image.  I'll have to experiment, it probably
depends upon which image is used.

JP


"Daniel Matthews" <dan#@3-e.net> wrote in message
news:100### [at] 3-enet...
> Something more complex than mapping the image to a sky sphere?
> Such as converting the image to an array of light sources distributed over
a
> sphere? There are examples of both pixel data to object conversions and
> spherical distribution of objects, you will need to look through the older
> news post to find them, both are in the last 6 months.
> There is also a Lighting inc that could be upgraded to perform such
> lighting.
>
> John Pallett wrote:
>
> >
> > Is there a way to coerce POV-Ray 3.5 into doing this without the patch?
> > Perhaps a pre-processing step on the HDR image and then the appropriate
> > radiosity parameters?
> >
> > JP
> >
> > "Gilles Tran" <git### [at] wanadoofr> wrote in message
> > news:3e04e8bf@news.povray.org...
> >> 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: Lightning strikes.
>

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