To make ripple fx:

First, creat a few textures:

 

Next, use the textures to make a few materials: material for ripple

Then, using the materials to make Particlesystems:

 

What I learned:

use this: and this: to creat ripples like this:

(The Panner expression moves the UV coordinates of a texture. It can take in a 2 vector to override the default texture coordinates and a scalar value representing Time as inputs.

It also has two parameters (SpeedX and SpeedY) which are floating point numbers that determine the speed of movement in the X and Y axes. )

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