Beer glass scene creation
This course contains a little bit of everything with modeling, UVing, texturing and dynamics in Maya, as well as compositing multilayered EXR's in Photoshop.
# 1 02-01-2004 , 01:59 PM
victstep's Avatar
Registered User
Join Date: Dec 2003
Posts: 10

How to create atmosphere shader?

Hi!

May anyone help me:

How to create photorealistic atmosphere shader for planet Earth.

Thanks.

Attached Images
# 2 02-01-2004 , 05:15 PM
Kurt's Avatar
Registered User
Join Date: May 2002
Location: Niagara Falls, Canada
Posts: 5,310
One way you can do it is make another sphere that is just a bit bigger than the oringinal and add a cloud texture it then play with the transparentsy and cloud shape.

I'm sure once Rage or mike sees this they will have other ways about doing it at well.


I am enough of an artist to draw freely upon my imagination, knowledge is limited, imagination encircles the world. (Albert Einstein)

https://www.artstation.com/kurtb
# 3 03-01-2004 , 01:53 AM
victstep's Avatar
Registered User
Join Date: Dec 2003
Posts: 10
Thanks Kurt.
But nobody else don’t want help me with this actually stupid question...

# 4 03-01-2004 , 04:55 AM
NitroLiq's Avatar
Moderator
Join Date: Nov 2002
Location: New York
Posts: 2,133
Actually, if you check the other post here, you'll see some others, myself included, that already helped you.


"Terminat Bora Diem, Terminal Auctor opus."
# 5 06-01-2004 , 07:03 PM
victstep's Avatar
Registered User
Join Date: Dec 2003
Posts: 10
Well, thanks again...

SamplerInfo.facingratio -> ramp.vCoord
ramp.OutColor -> lambert.transparency

ramp:
Type: Vramp;
Interpolation: Linear
lambert:
Color: blue

BUT LOOK AT THIS:
what wrong??? (I mean lines, not a color or transparency)

Attached Images
# 6 06-01-2004 , 07:06 PM
victstep's Avatar
Registered User
Join Date: Dec 2003
Posts: 10
I am also try all ramp Interpolation's (exponential, smooth)
and also try to use ramp colors white and blue and lambert color black but...

what I do wrong???
Help me please!!!

This picture without atmosphere:

Attached Images
# 7 06-01-2004 , 08:18 PM
victstep's Avatar
Registered User
Join Date: Dec 2003
Posts: 10
ha ha ha

Do you know what was that?
It was point ligh with fog!!!

Everything is OK, now just need to "play" with colors and other things.

Thanks.

Attached Images
# 8 08-01-2004 , 03:53 PM
rich's Avatar
Subscriber
Join Date: Oct 2003
Location: Paris, France
Posts: 418
Dude! Download my Earth shader!!! It's already done for you. And it doesnt use 3 spheres but a bunch of maps hung together on a layered shader.... no messing around with geometry! user added image

Click the link in my sig.


That'll do donkey... that'll do...
# 9 09-01-2004 , 10:38 PM
victstep's Avatar
Registered User
Join Date: Dec 2003
Posts: 10
Thanks Huxley

but whats wrong with my scene (excluding atmosphere and clouds)?

# 10 12-01-2004 , 07:37 PM
dragonfx's Avatar
Registered User
Join Date: Jul 2003
Posts: 1,257
Play with lights/ambient to make it look cool, as oposed to making it phisically acurate another problem is the specularity, you need to make a map: no specular on continents just a little bit on sea. also the atmosphere isnt specular turn to 0 all specular shading there
Also download a cool clouds map (for example from the bluemarble project)and add an extra sphere with the inverse of the color as the transparency and bump add another layer with procedurals if you wish.
Also the atmosphere is thicker near the ground... i havnt been able to make the damn volume shaders work properly but ragecgi maybe knows how to fake it in other way so now i think about it:
Rage how to fake the atmosphere going thicker towards the ground on the edges?


Last edited by dragonfx; 12-01-2004 at 08:15 PM.
# 11 13-01-2004 , 09:35 AM
dragonfx's Avatar
Registered User
Join Date: Jul 2003
Posts: 1,257
heh, why if i just turn on mental ray it works fine and if you render with mayas native it just wont display?
It would have saved me time back then when i was trying the earth scene(cmon, i dont think theres someone that hasnt tried it at least once)but why it wont work on scanline?

Heres a quick&dirty example of what i meant with the atmosphere going thiker near the ground(just a volume fog in a spherre)

Attached Images
Posting Rules Forum Rules
You may not post new threads | You may not post replies | You may not post attachments | You may not edit your posts | BB code is On | Smilies are On | [IMG] code is On | HTML code is Off

Similar Threads