Underwater particles information?

[kangoocarl1]

I am using the method (adviced by Georgi..) to render Foam and Splash by using a Vray instancer (with my own bubble-geometry as well as my own Vray materials...) to be able to render my ocean scenes with Vray GPU. All this works fine. Only thing I cannot figure out is how to detect the foam and splash particles that are "underwater". Since my Vray shader dows not know any realtion in bewtween it´s geometry and the liqouid surface: Is there any way to e.g. render out a path or something else that would let me have this information for postproduction/compositing? i was thinking of WorldPosition information but anything I tried does not work. Any help appreciated guys!

[georgi.zhekov]

Unfortunately I can't think of way to do that yet. The Particle shader has such functionality but it still has to be ported on the GPU.

[kangoocarl1]

Georgi,
thank you for the quick reply!

[Ivaylo Katev]

perhaps you can use distance texture, i think it has separate color for inside/outside.

[georgi.zhekov]

The distance texture is still not implemented on the GPU though..