Hi
I made a simple project with flip fluid and attached in below

I use SOPSolver to apply some random color to each point(or particle).
Now I want to do somethings to apply Gravity force just to white particles

for example each particles that is Black stay on it's own position and each particles that has white color fall down with gravity force /
(Gravity Force only affect on white particles )

Thanks

you could group the white particles in a pop-solver and apply the pop-gravity just to that grp
Infernal

That's Great !
Really Thanks my friend