realistic water lighting effect

[henry_walon]

Hi everyone,

I’m using SketchUp 2026 with V-Ray, and I’m trying to create a realistic water lighting effect — something like caustics or moving light patterns under water.

I’ve experimented by putting lighting under a water plane and playing with opacity and refraction, but it didn’t generate any visible caustic or wave-light effect.

Does anyone know the correct way to achieve this kind of effect in V-Ray for SketchUp?
Should I use Caustics, a Light Texture, or maybe a Gobo map for the light?
Any specific settings or workflow would be much appreciated.

(Reference image: see pics

Thanks in advance for any guidance!

— Henry

[henry_walon]

Hi
if anyone’s interested — I finally found the solution!