A natural situation

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yonosoy
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A natural situation

Post by yonosoy » Sun Dec 02, 2012 12:04 am

Hi.
A very simple situation. Still nude, only geometry, without a physical spectrum definition for sun and atmosphere.
Real scale. Meshes from Houdini thanks to a procedural node from cmiVFX (fractal terrains). Process, materials, technical questions and much more will be posted with time.
Situacion 001 0.30 h 800 k samples-s.png
"... the hamster don't see the wheel, and this wasn't said before." (yoS eidaN "el Olvidao")
"... nor 0.2 galaxys, nor 0.8 little chikens ..."

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yonosoy
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Re: A natural situation

Post by yonosoy » Sun Dec 02, 2012 1:43 am

With the sun in another azimuth. The reference of time and samples second corresponds to an Amd desktop and a i3 notebook connected via LAN (8 threads).
Situacion 002 0.33 h 800 k samples-s.png
"... the hamster don't see the wheel, and this wasn't said before." (yoS eidaN "el Olvidao")
"... nor 0.2 galaxys, nor 0.8 little chikens ..."

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CTZn
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Re: A natural situation

Post by CTZn » Sun Dec 02, 2012 6:04 am

Cool ! Do you know that Indigo has an Earth-like atmosphere simulation ? It is tricky to set up but it provides a very realistic result.

See:
http://www.indigorenderer.com/planet-sc ... simulation
http://www.indigorenderer.com/forum/vie ... 35#p101435

The camera can fly through that atmosphere, it's pretty exciting to have the camera around the ionosphere ! This feature was used to bake the sun & sky lighting scheme that exporters now use by default.

There was a test scene posted in the forum but I can't find it right now...
obsolete asset

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yonosoy
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Re: A natural situation

Post by yonosoy » Tue Dec 04, 2012 12:21 am

Hi.
Yes, but thinking that this was a complement to the sun-sky system. So silly...

Some weeks testing with atmosphere medium (and the sky behind..) with a couple of problems that seems to be better now.
Actually the scene is carried out throug Cinema 4D. The radius of Earth was estimated at the begining in 6376 km. In C4D material´s preview atmosphere remains black wiht a Y value of -6376 km. At a value of -6377, -6378 the previsualization is right. If the scene is below of the sea level (in reference to the atmosphere consideration) the light seems don´t do all the travell. The sky lights and can be visible but the scene is basically or totally black. The global earthmesh was losing around 1-3 of effective kilometers because of the traduction in polygons.

The other tricky question is that little fire-flies becomes chromatic when a real tabulated media is present and post pro AD is on. Over a supersample factor of 4 the fire-flies (or chroma) are not visible in the photograph, but for AD could be a festival.

This is a shoot from 1.2 km of height (5 km below than the firsts) with Indigo´s atmospheric medium and a real scale sun (at the moment a primitive sphere wit a 6000º K blackbody material (I know that it´s possible to use an extra atmospheric sun in Sun-Sky system that for sure has a complet spectrum)).
Situation 03 2.53 h 26600 spp 444 ss (PP AD).png
"... the hamster don't see the wheel, and this wasn't said before." (yoS eidaN "el Olvidao")
"... nor 0.2 galaxys, nor 0.8 little chikens ..."

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OnoSendai
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Re: A natural situation

Post by OnoSendai » Tue Dec 04, 2012 1:02 am

Hi Yonosoy,
The Indigo atmosphere medium starts at exactly 6378135 m from the centre of the Earth.

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CTZn
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Re: A natural situation

Post by CTZn » Tue Dec 04, 2012 2:38 am

I have attached the globe_test.igs as it is on my hard drive currently, but I think that I have tried merging several tests scenes into that file, not necessarily with much success in this case. However the data within should be original, so you can get usefull informations from it. Notably, the globe radius is 6378135 meters. <- *spoiled*

The postpro AD is a 2D filter wich doesn't discriminate pixels, that's the downside of its readyness.

PS: me gusta el appelido que has eligido, que lindo :)
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OnoSendai
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Re: A natural situation

Post by OnoSendai » Tue Dec 04, 2012 2:46 am

Here's a better / more recent scene:
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globe_test_in_atmosphere2.igs
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yonosoy
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Re: A natural situation

Post by yonosoy » Thu Oct 03, 2013 11:29 pm

Hi, a year later ant still no much...

The troncotron; a visual approximation at the moment...
Attachments
tejido_64_2.jpg
tejido_64_1.jpg
troncotron_sinfin_plata_01.jpg
Last edited by yonosoy on Wed Oct 16, 2013 3:28 pm, edited 3 times in total.
"... the hamster don't see the wheel, and this wasn't said before." (yoS eidaN "el Olvidao")
"... nor 0.2 galaxys, nor 0.8 little chikens ..."

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lycium
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Re: A natural situation

Post by lycium » Fri Oct 04, 2013 8:52 am

*Awesome* work in this thread, hi and welcome yonosoy!

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yonosoy
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Re: A natural situation

Post by yonosoy » Fri Oct 04, 2013 12:36 pm

So many thanks.
This is an old paper, custom atmosphere whit Henyey-Greenstein phase function (because of ignorance).
The rim of the wheel with more teeths in the world. La llanta del corresembraos. [ llanta=llantá > dentada; llantar=comer ]
(ethimology is quite neccesary to understand this project... please, time...).
Attachments
llanta_cromada_1.jpg
Last edited by yonosoy on Wed Oct 16, 2013 3:31 pm, edited 1 time in total.
"... the hamster don't see the wheel, and this wasn't said before." (yoS eidaN "el Olvidao")
"... nor 0.2 galaxys, nor 0.8 little chikens ..."

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yonosoy
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Re: A natural situation

Post by yonosoy » Sat Oct 05, 2013 11:25 am

With a smaller surface of reference caustics definition increase a lot. The first are over 2 x2 km. and this one over 200 x 200 m.
Attachments
tejido_16_1.jpg
Last edited by yonosoy on Wed Oct 16, 2013 3:34 pm, edited 1 time in total.
"... the hamster don't see the wheel, and this wasn't said before." (yoS eidaN "el Olvidao")
"... nor 0.2 galaxys, nor 0.8 little chikens ..."

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yonosoy
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Location: Spain

Re: A natural situation

Post by yonosoy » Sat Oct 05, 2013 12:22 pm

Very interesting experiments with non habitual formats (sadly limited in software). Possibilities for real procedural modelled cameras are awesome and indigo... (remembering the experiments of fused).
Attachments
2m_film_3.jpg
2m_film_2.jpg
2m_film_1.jpg
Last edited by yonosoy on Wed Oct 16, 2013 3:42 pm, edited 1 time in total.
"... the hamster don't see the wheel, and this wasn't said before." (yoS eidaN "el Olvidao")
"... nor 0.2 galaxys, nor 0.8 little chikens ..."

User avatar
yonosoy
Posts: 484
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Location: Spain

Re: A natural situation

Post by yonosoy » Sat Oct 05, 2013 5:47 pm

A test of section bodies. Take a fine look to the perfect section (45 min over 2 core).
Attachments
seccion_esferica_01.jpg
Last edited by yonosoy on Wed Oct 16, 2013 3:45 pm, edited 2 times in total.
"... the hamster don't see the wheel, and this wasn't said before." (yoS eidaN "el Olvidao")
"... nor 0.2 galaxys, nor 0.8 little chikens ..."

User avatar
yonosoy
Posts: 484
Joined: Sat Dec 01, 2012 9:45 pm
Location: Spain

Re: A natural situation

Post by yonosoy » Sat Oct 05, 2013 6:45 pm

And the last for a days. So brut in this moments, but it's a try with real tabulated absortion and SSS in real scale. Work's only in console in this little machines and run well !. A simple bump pos(OS) (awaiting for this). Now, to learn ISL ...

P.D: Manages this automatically the pages? (seem too long)
Attachments
test_001.jpg
"... the hamster don't see the wheel, and this wasn't said before." (yoS eidaN "el Olvidao")
"... nor 0.2 galaxys, nor 0.8 little chikens ..."

User avatar
yonosoy
Posts: 484
Joined: Sat Dec 01, 2012 9:45 pm
Location: Spain

Re: A natural situation

Post by yonosoy » Sun Dec 01, 2013 7:05 am

Testing with Metropolis Path Tracing and glass acceleration on.
Silver's sphere diameter 1 kilometer. (89º zenith). 20 h.
test_011.jpg
The first hours of Path Tracing (this time glass acc. off) scares a bit, but it's expected a convergence near the hour 60 (like other precedente images (4 old threads of 2.40)). To be updated when finished. (72º zenith).
test_012_01.jpg
Note: in the try to photo develop the exr raw format since a time (sorry for this, sometimes loose coherence).

At the same condition time over an i3 (4 no old but slow threads of 2.10) and Metropolis Path Tracing (glass acc. off again). Maybe a convergence time of a half expected. Since a versions, glass acc. is allowing (pretty bad) the travell of ligth in bidireccional mode.
test_012(metro)_01.jpg
"... the hamster don't see the wheel, and this wasn't said before." (yoS eidaN "el Olvidao")
"... nor 0.2 galaxys, nor 0.8 little chikens ..."

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