Blender | Trying Dynamic Paint for a Rain Simulation

What Is Dynamic Paint

It seems to be a physics simulation system that treats Objects as a Canvas and Brush, letting you deform color or mesh.

Example: Making Rain and a Puddle Animation

1｜Set Up the Rain

1. Create the rain object.
2. Create a plane covering the area where rain will fall.
3. Set up a particle system on the plane:
   · Set particle count to around 10000.
   · Set Render to Object and assign the rain object.
4. Bake the animation result and play it back.

2｜Set Up the Puddle

1. Add a plane.
2. Subdivide it in Edit Mode (around 400).
3. Set the material to Glass BSDF.

3｜Set Up Dynamic Paint on the Brush

1. Add Dynamic Paint to the plane that acts as the rain source.
2. Set the type to Brush.
3. Set Source > Paint to Particle System (rain).
4. Assign the rain particles.

4｜Set Up Dynamic Paint on the Canvas

1. Add Dynamic Paint to the puddle plane.
2. Set the type to Canvas.
3. Set the Surface Type to Wave.
4. Assign the Brush Collection to the collection containing the rain source plane.

Animation

Once you’ve adjusted the parameters, Bake it and check the animation.