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!
Full Version: Earth atmosphere?
Another good example:
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.
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.
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...
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...
exactly, just Peak, then VDB from polygons, and apply pyroshader
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!
Thanks!
Terence ZieglerYou can use it for the "planetary" atmosphere too.
The karmaskyatmosphere is good for the look of the planet itself.
Just playing with the parms I found that distribution can be used to increase the feather etc.
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.
Aslak,
In your setup, is the planet a VDB? Or only geo sphere?
Thanks!
In your setup, is the planet a VDB? Or only geo sphere?
Thanks!
Just a really large sphere, the karma atmosphere does the rest.
Attaching the hip.
Attaching the hip.
I tried that. But it's not transmissive. It renders as an opaque sphere.
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.
updated the hip to have a texture on the planet.
You're dealing with huge scales, the atmosphere's density is going to have to be extremely low for it to be transparent.
Thanks, guys! Very helpful. Appreciate it.
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
I got it to work by stacking the earth UNDER the cloud and the physical sky layer.