A natural situation

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yonosoy
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Re: A natural situation

Post by yonosoy » Thu Nov 05, 2015 11:26 am

Thanks for the tip, now it is necessary an email to send the message.
I don´t know where to send the scene; please someone...
"... 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 ..."


https://www.instagram.com/yonosoy_nada/

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OnoSendai
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Re: A natural situation

Post by OnoSendai » Thu Nov 05, 2015 11:32 am


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yonosoy
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Re: A natural situation

Post by yonosoy » Sat Nov 07, 2015 6:57 am

Sended. Thanks.
"... 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 ..."


https://www.instagram.com/yonosoy_nada/


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Vrender
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Re: A natural situation

Post by Vrender » Sun Nov 08, 2015 7:31 pm

Looks nice!
Thanks for the tip!
tell me please where you can download Indigo scenes examples? Exterior an Interior
Vrender Company Architecture Visualization Services

sam mcfly
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Re: A natural situation

Post by sam mcfly » Tue Jan 26, 2016 3:11 am

Hello guys,

i'm trying to make a space scene with Saturn but i can't simulate the atmosphere, i use blendigo.

is there a material that could do it?

Thanks.

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yonosoy
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Re: A natural situation

Post by yonosoy » Wed Jan 27, 2016 5:11 am

Hi. Yes it is possible to simulate some kind of atmosphere for a planet. This post start up when we realized that indigo do this kind of jobs. A quick aproximation is to play with henyey-Greenstein phase, like in this example.

Code: Select all

<henyey_greenstein>
								<g_spectrum>
									<rgb>
										<rgb>0.9 0.8 0.35</rgb>
										<gamma>2.2</gamma>
									</rgb>
								</g_spectrum>
							</henyey_greenstein>
The IOR is 1, the absorption value is 0, the scattering value is of 0.000001. The values for rgb gives you a meant of colour (bluish in this case).
Remember to use simple path tracing for a volume of this characteristics (like for atmosphere). Remember too that you can´t change the values for the medium in the GUI, because the medium changes from henyey-greenstein to uniform phase (reported some times before).
This message appear when i try to upload the igm file:
"The upload was rejected because the uploaded file was identified as a possible attack vector."

Hope this helps. Cheers.
Attachments
planet´s atmosphere.png
planet´s atmosphere.pigm
(601 Bytes) Downloaded 133 times
"... 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 ..."


https://www.instagram.com/yonosoy_nada/

sam mcfly
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Joined: Fri Jan 16, 2015 4:09 am

Re: A natural situation

Post by sam mcfly » Fri Jan 29, 2016 1:07 am

thank you, but do i need to create a new sphere and make this material?

or can you upload it as an external material (.igm)? so i can use it in blendigo, thanks :)

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CTZn
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Re: A natural situation

Post by CTZn » Wed Feb 03, 2016 9:08 am

sam mcfly wrote:thank you, but do i need to create a new sphere and make this material?

or can you upload it as an external material (.igm)? so i can use it in blendigo, thanks :)
You can get to the IGM by renaming the PIGM as a ZIP file and extract its content.

Well done yonosoy. Of course at some point I started a fully procedural approach but it went stalling. I did actually :lol:
obsolete asset

sam mcfly
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Re: A natural situation

Post by sam mcfly » Thu Feb 04, 2016 1:04 am

Thank you.

But i don't see any difference. Do i need to set my sphere with the real radius of saturn?

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yonosoy
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Re: A natural situation

Post by yonosoy » Thu Feb 04, 2016 9:00 am

Hi Sam, sorry for the delay (not at work lately).

The procedure is this:
Take a sphere (not perfect, usually i used the icosahedron one). This is the planet so take a right spherical texture and do a material, an oren-nayar or a diffuse or even a phong with a very low exponent (you speak about Saturn, I think that is the texture I use for the example).

You need then another sphere for the atmosphere. In the case of Earth, it has 80 km. of high. Maybe try to read about for the correct thickness of Saturn (in the example I use 50 km.) Apply to this sphere the material uploaded.

SPHERE A (planet) = radius A ; SPHERE B (atmosphere) = radius A + atmosphere thickness

Indigo is a light simulator that take in account every step in physics. Is important to model at real scale. The material uploaded is for the right dimension of Saturn. In this singular case you can model the scene in another scale (try to regulate the amount of SSS (in the example, for the right dimension of Saturn I used 0.0000001)). It was a quick approximation, refine it.

Hope this helps; if you have another question, do it!
"... 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 ..."


https://www.instagram.com/yonosoy_nada/

sam mcfly
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Joined: Fri Jan 16, 2015 4:09 am

Re: A natural situation

Post by sam mcfly » Fri Feb 05, 2016 6:37 am

I tried it, and it works fine thanks for your help :)

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yonosoy
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Re: A natural situation

Post by yonosoy » Wed Feb 17, 2016 3:30 am

Two not finished. Just remembering some possibilities for this kind of scenes (a sphere, a box and a plane).
Attachments
random landscape in atmosphere with two cloud layers_A.jpg
random landscape in atmosphere with two cloud layers at an azimuth of 92º_B.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 ..."


https://www.instagram.com/yonosoy_nada/

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OnoSendai
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Re: A natural situation

Post by OnoSendai » Wed Feb 17, 2016 4:02 am

Stunning!

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Oscar J
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Re: A natural situation

Post by Oscar J » Wed Feb 17, 2016 4:35 am

Awesome. What are the render times for these?

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