Motionblurring a fluid surface

[TomRaynor]

I have a particle fluid surface that is being generated around some scattered points and those scattered points are moving on a deforming surface.

I want to render with motion blur, the resultant mesh generated by the particle fluid surface. I am getting weird results and the motion blur is all over the place.

I am using a trail SOP after the particle fluid surface and using geometry velocity blur. I believe the problem is that because the point count of the generated mesh is changing every frame, the trail is totally freaking out because, for example, point number 5 might be somewhere on frame 1 and somewhere completely different on frame 2 because of the changing point counts.

It must be possible to motion blur something like this. Anyone able to help with some suggestions?

Thanks!

[CeeGee]

Hi Tom,

You can try this scene, you need to measure your geometry, on first frame, and use that AREA attribut in scatterSOP, then everything is fine.

I hope this help.

Igor

deform_scatter.hip

Edited June 24, 2013 by CeeGee

[TomRaynor]

Aaah, I was scattering using a painted attribute before anyway so the scatter wasn't changing its point distribution it was just that I applied a trail SOP after I meshed the points instead of applying it to the points and having the mesh inherit the velocity attributes from the scattered points. Silly me...

Cheers Igor!