Hello.
I would. Just look like the light reflects from the water to the rock



It was great !!!
I do not know if such a feature is in cryengine 5 or not.
Unfortunately, cryengine 3 had better effects !!!

Is this feature in cryengine 5?
For better understanding, see the video below from 37 seconds.
https://youtu.be/31r7hValFSs?t=37

This is caustic, look in the documentation. In Cryengine 5 works!

This is caustic, look in the documentation. In Cryengine 5 works!

This is a problem for me.
Have you tested?
Just like the picture below:
(Reflection of light on the stone)