Optimize Raycaster for Splash and foam particle

[jp3d81]

Hi,

I made a scene where somethings is falling in the sea.
I want to render this with motion blur. But it takes really long to render when splashes and foam
are rendered with motion blur.
Any ideas how i can optimize the render settings for scenes like this?
Maybe i can tune the raycaster?

[Ivaylo Katev]

you can render in separate passes (foamand splash must be in one pass) and compose. the rendering is much slower when refractive object and atmosphere are rendered in one.

[jp3d81]

Thanks,
rendering in separate passes didn´t speed up the rendering. But i made a resim of the particles with a lower birth threshold.
And reduce the motion blur samples. The render speed is much better now.