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Redshift Cloud Volume Stepping issues
updated 3 hours, 11 minutes ago
2 Members
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7 Posts
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Hi!
I have some volume cloud render difficulties I could need some help for:
Goal is getting an Earth Globe and a volumetric clouds layer that is as detailed as possible and based on a cloudanimation grayscale image-sequence. Currently built by using a 100cm sphere that gets distorted by a displacer using the cloudanimation grayscale image-sequence as the shader for the displacer. Then placing that deformed sphere in a volume builder and subtracting a non-displaced 100cm sphere. Shown here:
Now the issues I need help with:
Currently with my Ryzen7950X+64GBRAM+RTX3080Ti I can not go below 0,2cm voxel size. Anything below that and Redshift stops to display any volumes. But I still have a lot of those circular bending-steps as shown here:
Although I allready added a Fog Smooth and a Fog Curve to minimize them. They will show in animation way more and specially when the camera gets closer to the globe. And the volume builder calculation time with this setting is allready around 1min. So the question is:
Is there any way to get more detail into the clouds, less stepping and still much faster setup times within a cienma4D+Redshift setup?
Thanks!
Sascha
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Hello Sascha
There could lots of reasons why it’s not showing below
1. You might not have strong vram to display that
2. Make sure your files wrote out the channel data and your using that exact same name to read it back in on the rsVolume shader
3. It might be corrupted because it sounds like something went wrong with the VDB data grids.
Try a new download a test file
These should provide solutions to it or check the video tutorials below
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Hi Bosten, thanks for your input on this!
About the light contribution. Yes I have all lights contribute 1. And GI is set to brute force.
About the VDB. I am not using an external VDB. Actually My setup is the same as the one in your second video. BUT. While the guy in the second video uses a rather “small” and “thick” block to put his clouds into I have a very “thin” and comparably “huge” sphere. So while at his setup he needs to go down to 1 and the voxels allready render quite a while to get to that resolution but with the “surface” I need to cover it, it is not possible to go small enough with the voxels as in “Fog” mode of the volume builder it always calculates the complete sphere and not only the thin surface I need for the global cloud layer. And Redshift volume does not work with the SDF mode of the volume builder. The SDF mode would do what I need: Only create voxels around the surface of the sphere and by that creating way less voxels meaning higher resolutions would be possible. But as long as the SDF mode is not supported by Redshift, C4D is not capable of doing things like this:
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Good to know! Maybe with those types, in some kind of custom node based rig, something like this would be possible… but thats way beyond my skillset 😉
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Thank you my Master! May the force be with you, aswell!
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