Forums Solaris and Karma Earth atmosphere?

Earth atmosphere?

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Terence Ziegler
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Hello all,
I'm still looking for the best workflow for the atmosphere around Earth. The karmaskyatmosphere is good for the look of the planet itself.

But how do I create the soft haze of the atmosphere? (see attached)

Thanks!

Attachments:
earth4.jpg (359.2 KB)

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Terence Ziegler
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Another good example:

Attachments:
earth3.jpg (314.5 KB)

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Mladen Kevic
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Hi Terence,

I'm just working on some space shots. My approach was to create one slightly larger sphere and to convert it to VDB fog, with applied karma pyroshader.
Edited by Mladen Kevic - 2026年5月6日 10:38:22

Attachments:
Earth01.png (1.1 MB)
Earth02.png (410.6 KB)

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Terence Ziegler
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Thanks Mladen,

All you did is use VDB from Polygons, but use fog?

What does your Karma shader look like? I'm not seeing my sphere rendered as a volume...
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Mladen Kevic
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exactly, just Peak, then VDB from polygons, and apply pyroshader

Attachments:
atmosphereSetup.png (303.0 KB)

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Terence Ziegler
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That's a good approach. Now trying to figure out how to make the center of the atmosphere more transparent, looking straight on. And the outer edges softer.

Thanks!
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AslakKS
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Terence Ziegler
The karmaskyatmosphere is good for the look of the planet itself.
You can use it for the "planetary" atmosphere too.
Just playing with the parms I found that distribution can be used to increase the feather etc.

Attachments:
kma_planetary_atmosphere.png (681.3 KB)

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Tanto
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That's a good approach. Now trying to figure out how to make the center of the atmosphere more transparent, looking straight on. And the outer edges softer.

In a volume wrangle, connect your atmosphere in input1 and earth model in input 2.
Then: 

float altitude = xyzdist(1, v@P);
float max_altitude = chf('max_altitude');
float falloff = chramp('density_falloff', altitude / max_altitude);
float finalmult = chf('mult');

f@density = falloff * finalmult;

Then create the spare parameters and adjust the density with the ramp tool.
Edited by Tanto - 2026年5月6日 12:08:30
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Terence Ziegler
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Aslak,

In your setup, is the planet a VDB? Or only geo sphere?

Thanks!
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AslakKS
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Just a really large sphere, the karma atmosphere does the rest.
Attaching the hip.
Edited by AslakKS - 2026年5月6日 12:56:07

Attachments:
planetary_atmosphere.hiplc (303.0 KB)

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Terence Ziegler
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I tried that. But it's not transmissive. It renders as an opaque sphere.
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AslakKS
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What do you mean by transmissive? The planet is "bellow" the atmospehere created by Karma Atmosphere.
updated the hip to have a texture on the planet.

Attachments:
karma_atmosphere_60fps.mp4 (3.7 MB)
planetary_atmosphere.hiplc (540.1 KB)

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Tanto
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You're dealing with huge scales, the atmosphere's density is going to have to be extremely low for it to be transparent.
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Terence Ziegler
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Thanks, guys! Very helpful. Appreciate it.
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Terence Ziegler
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This approach works well, Aslak. Have you tried layering clouds? I've tried merging multiple sop creates for earth + clouds, but that breaks this cool approach. So no luck with that yet
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Terence Ziegler
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I got it to work by stacking the earth UNDER the cloud and the physical sky layer.
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