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General => Terragen Discussion => Topic started by: AndreasVFX on October 13, 2021, 08:00:46 pm

Title: Possible to increase cloud resolution
Post by: AndreasVFX on October 13, 2021, 08:00:46 pm
Is it possible to increase the resolution of clouds? I know you can increase the resolution of the lighting, but what about the voxels themselves?
Especially when we use spherical camera the clouds can look a bit voxelated or just blurry in the top of the image so would be nice to increase the resolution here.

Cheers,
Andreas
Title: Re: Possible to increase cloud resolution
Post by: WAS on October 13, 2021, 08:30:00 pm
Yeah, the voxel buffer resolution under optimization. You set it through millions of voxels.
Title: Re: Possible to increase cloud resolution
Post by: AndreasVFX on October 14, 2021, 06:28:46 am
For me the results looks exactly the same though. Still a bit blobby. I though it was maybe only the light resolution. I will try it out some more
Title: Re: Possible to increase cloud resolution
Post by: cyphyr on October 14, 2021, 09:13:48 am
Unfortunately the deeper your easy cloud formations are (cloud depth) the larger the smallest details become.
I do not know of a solution to this.
Title: Re: Possible to increase cloud resolution
Post by: WAS on October 14, 2021, 01:34:09 pm
It sounds like you're describing the density itself. If you have a large lead-in scale, and large primary scale, most the shapes will be large. Try a smaller scale. If you're close to the volume, you'll need to bring down the Smallest Scale. Such as for mist/fog close to the camera.

Voxel resolution is used for exporting the OpenVDB format.
Title: Re: Possible to increase cloud resolution
Post by: Matt on October 16, 2021, 01:03:08 am
If you're using an Easy Cloud layer, try reducing the "smallest scale" on the Quality tab by a factor of ten and see if that makes a difference.

Although the Easy Cloud has limited control over the built-in fractals, you can add more detail and really push the values around using a Mask input. A Cloud Fractal Shader with high roughness (like 5 or higher) can add some wispy details and break it up in interesting ways. To create a subtle breakup I would give this mask shader a "Coverage adjust" setting of 1 (so its values average around 1, although lower values can work too), and play with its contrast setting to change the strength of the breakup. For a subtle wisp or detailing effect, the feature scale and lead-in scale should be much smaller than the depth (thickness) of the cloud you are affecting.