Bug : WaterVolume Component Caustics failure

Github Issue:

https://github.com/aws/lumberyard/issues/416

Describe the bug :

WaterVolume Component Caustics failure

Steps to reproduce:

  1. Create new Level
    2.Create new entity with WaterVolume component
    3.enabled caustics
    Expected behavior:
    WaterVolume Component Caustics Like Ocean

Screenshots/Logs:
Caustics Effect with WaterVolume:
1
Caustics Effect with Ocean:
2

Lumberyard version:
v1.19.0.0 - Build 918128