Underwater Scene - Bifrost Boss - Water suface & Gobo light

 1. Create a geometry and add more divisions.

2. on FX, go to Boss> Boss Editor

3. select the geometry and create a wave layer as below:

You can adjust the wave value to what you want it and also you could add more wave layer together.

4. select the geometry and change the shade/ material to deep sea

5. Add light effect

1) add a Dom light with an
underwater background

2) add a direct light

3) got to Light Filters Add> Gobo

4) go to aiGobo add a texture on Slide Map > Noise

5) got to Render settings > Arnold Renderer> Environment>Atosphere> Create AlatmosphereVolume

6) more adjustment on the light setting and make it work for the scene

Final look: