How to create custom textures/maps for volumetric clouds?

Unity Engine
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1

I am wondering how you make textures to change the shape of volumetric clouds in HDRP. I am able to do a decent amount of customization directly in the editor, but not quite enough. I would like the clouds in my game to look closer to the clouds in Red Dead Redemption(I tried to attach an image, but I don’t know if it worked. I never did uploaded an image to a post before.)
Are there any tutorials about how to do this? I couldn’t find any. I know extremely little about graphics and making textures, as I am more of a programmer than artist.
Thanks for the help!

9013591--1242748--BD6735C5-68DA-4864-BA15-C91DF88F8E5C.jpeg
9013591--1242748--BD6735C5-68DA-4864-BA15-C91DF88F8E5C.jpeg3840×2176 748 KB

Ps. How do you get the clouds to have godrays? Do you just have to have volumetric fog up really high, and set the clouds to local space? Or is there a more efficient method of achieving this? Kind of like the godrays in the image above.

2

https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@16.0/manual/Override-Volumetric-Clouds.html
You can find some information about this topic on HDRP documents.

3

Make the fog height and distance higher, or you can make a post effect that only calculate the godrays of the clouds.

4

Thanks!