How is the cloud created? As mesh?

Hi guys. Does anyone know how the clouds are created? Are the clouds meshes? What object is the cloud?

 

Those clouds are probably meshes because they have a solid, definite shape. There are lot's of different ways to make clouds, though. You could also use a particle system or billboarded sprites. A lot of times they're just part of the skybox. It all depends what you want it to look like.

 

Yeah, I agree. The clouds look like mesh objects.

 

As mentioned above, these do look like cloud-shaped meshes - or billboards using alpha-test (https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-clip)
To get smoother results with billboard clouds, alpha blending is probably preferred (https://docs.unity3d.com/Manual/SL-...34.921442730.1643643659-2098734352.1619259050)

"Background" clouds can also be baked directly in the skybox/cubemap.
HDRP's Cloud Layers allows you to layer and simulate your background clouds, using a Volume Override.
https://docs.unity3d.com/Packages/c...inition@12.0/manual/Override-Cloud-Layer.html

On top of skybox clouds, you can also layer your own "2D" billboard clouds - to achieve a more believable scene.

In a high-end use case, instead of billboards, you might want to use volumetric clouds.
Volumetric clouds use expensive raymarching of signed distance fields - also utilizing perin/worley noise - for achieving nice "fluffy" clouds.
Volumetric clouds are fully 3D, and can receive light / cast shadows.

HDRP recently released a Volume Override which implements Volumetric Clouds:
https://docs.unity3d.com/Packages/c...n@12.0/manual/Override-Volumetric-Clouds.html

Keep in mind, volumetric clouds are expensive - and in many cases you can do just fine using Skybox clouds + billboards.

 

Mesh + AO map (ambient occlusion)

1. Create a mesh using sculpt tool
2. Use substance painter to bake AO and create a white texture + ao map