Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download 3D Cloud Models Free.
3D Cloud Models v1.01
NOTE If this download link require a Decryption key, please enter this key: _wdQyXDBJBQyGQUIB8FfZJNz90iZFlCqvBNCPXL69Is
3D Cloud Models is a collection of 15 curved-billboard meshes with photoreal cloud textures.
Features:
* 15 low polygon models: Duplicate, move, rotate, and scale the clouds in your scene to create epic skies and artistic direction.
* 3 custom shaders: Hard-edged Alpha Blend, Soft-edged Alpha Blend, and Alpha Clip. These shaders use just the RGB channels of the texture and not the alpha channel, keeping memory footprints low.
* A special Editor Script to make editing your clouds fast and easy. Dynamically change the ambient and sun color of the clouds. Also modify the contrast, density, thickness, and opacity. Easily orient them towards an object or the scene camera.
Note: The Alpine Terrain Pack terrain models and the background skybox featured in the demo are both sold separately.