Hi, I just watching the waterfall tutorial(by SideFX) and try to make one.
everything is fine exclude the spray. my spray even did not collide with surface, it will floats on air !?
http://www.youtube.com/watch?v=GyA2vygUlok&feature=youtu.be [youtube.com]

I can't find any differences setting between mine and tutorial, could anyone tell me where I wronged ?
(btw, I used POPnetwork to create spray. but use dop the result are some.)
thank you a lot !

iGou

I still don't know the reason but found a way to fix it.
just create a group node before VOPPOP. set group bounding box size and solver's are the same, and give VOPPOP this group as a source group.
then if particle go out from the group that VOPPOP will turn to disable.

I think you will find that the spray does weird things outside the bounds of the sim because the surface sdf data and velocities only exists inside the simulation grid. The data that is used for the velocities and surface position outside the grid are usually just the last voxel smeared in the direction out from the sim (You can see as the foam on the right lifts up to the positing of the surface on the edge of the grid).
You would be best to delete the particles outside the sim bounds.

got it! thanks for clearly explaining