[Best Practices] Diffraction for running water stream


I’m just trying to tackle the following effect to get started:

I’m preparing to recreate some of Mark Ferarri’s environments in UE4 in the near future.

Apply a normal map on the water with panning. This will distort the reflection.

And that will diffract the light like so?

It is a stylistic exaggeration of a natural phenomenon in shallow waterflow that makes the water seem cold and fresh.

Bump…itty bump.

This should help: Can Refraction operate on colour channels separately? - Rendering - Unreal Engine Forums

Brilliant. Thanks Jacky. The term chromatic abberation completely slipped my memory. It all came flooding back.

Thanks again.