mudv587/sand-shader-unity-urp-for-mobile

Mobile friendly Unity sand/snow shader using the Universal Render Pipeline

Sand Shader - in Unity URP for Mobile Phones

Demo tested on a OnePlus 3T, runs at 55 - 60 FPS

Demo Scene

In the demo scene (Assets/Scenes/Main.unity) you can spawn stones or a rake via the buttons.

• Left click / touch: drag object
• Long left click / touch: pick up object

Effect Setup

This effect uses multiple shaders and materials, as multipass shaders are to my understanding currently not available in Unity SRPs. Those multiple materials/shaders need to be controlled by a script. (Done in Assets/Scripts/Sand/DrawDepth.cs)

How it works:

• A depth texture is created from the underside of all movable objects and stored in a render texture.

• From this texture a difference texture is created, with the (stored) depth texture of the previous frame.
• This difference texture gets blured.

• The blured difference texture now gets subtracted from the existing sand depth texture.
• The depth texture from the beginning gets added to the sand depth texture.

This texture is saved as the new sand depth texture.

• The texture gets blured again. This texture is then used by the actual sand shader.

• The actual sand shader uses the depth map to modify the normals of the material. No actual displacement of the geometry happens.

License

• MIT license