Implementation of the Shadertoy Fluid Automata from Wyatt Flanders in Unity
This project works in any render pipeline as all the computation are done in a compute shader.
The Prefabs folder contains example of setup for the Standard and HDRP pipelines, but the URP pipeline is supported as well.
Create a material with a texture property referenced as _FluidTexture. Once linked in the FluidAutomataController script, this material will receive the computed fluid texture in the _FluidTexture parameter in play mode.
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Place your affector transform above the fluid surface.
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Add a collider to your fluid surface and set its layer to a layer contained in the FluidAutomataController layer mask parameter.
Note that in this example, the raycast is only done from the affector downwards.