View Full Version : [2018.0.2] Raytraced volumetric underwater rays

Mr. Wilde
03-07-2018, 05:48 AM
Is it possible to achieve under water rays by pointing a volumetric spot light at a transparent, refractive, nodal displaced plane?


So far, my spot light just shines through the plane without creating rays.

03-07-2018, 06:09 AM
This should be possible. I'm in the middle of a long render, so can't check for sure, but if memory serves, you need to turn on Use Volumetric Scattering, and also be sure the light is set to Effect Volumetrics (or something similar). I've used a distant light for this to simulate clouds, but can't see why it wouldn't also work with a spotlight.

03-07-2018, 06:11 AM
Scattering is what you might be missing. Is it on?ß

03-07-2018, 06:36 AM
You can try something like in my fast test. Textured volumetric light and fit to it textured plane.

Advanced Lighting And Volumetric Lights In LightWave 2018 by Antti Järvelä:

Mr. Wilde
03-08-2018, 01:49 AM
It works with a textured plane, which is kinda ok. I have my nodally displaced water surface, and then I have a plane that has the turbulence node as TEXTURE, and fake the volumetric rays that way.
So far I haven't found a way how to achieve the effect with actual refraction.

03-08-2018, 11:27 AM