DjangoBB LoFi version

Terence Ziegler

2026年5月6日 09:36:42

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!

Terence Ziegler

2026年5月6日 09:37:23

Another good example:

Mladen Kevic

2026年5月6日 10:33:25

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.

Terence Ziegler

2026年5月6日 10:52:22

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...

Mladen Kevic

2026年5月6日 11:28:09

exactly, just Peak, then VDB from polygons, and apply pyroshader

Terence Ziegler

2026年5月6日 11:43:54

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!

AslakKS

2026年5月6日 12:02:29

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.

Tanto

2026年5月6日 12:04:08

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.

Terence Ziegler

2026年5月6日 12:28:09

Aslak,

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

Thanks!

AslakKS

2026年5月6日 12:53:45

Just a really large sphere, the karma atmosphere does the rest.
Attaching the hip.

Terence Ziegler

2026年5月6日 12:56:23

I tried that. But it's not transmissive. It renders as an opaque sphere.

AslakKS

2026年5月6日 13:11:44

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.

Tanto

2026年5月6日 13:20:28

You're dealing with huge scales, the atmosphere's density is going to have to be extremely low for it to be transparent.

Terence Ziegler

2026年5月6日 13:26:00

Thanks, guys! Very helpful. Appreciate it.

Terence Ziegler

2026年5月6日 15:16:28

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

Terence Ziegler

2026年5月6日 15:21:33

I got it to work by stacking the earth UNDER the cloud and the physical sky layer.