POP Forces in FLIP Fluids

I did a quick test adding POP Forces to a FLIP simulation.  It's cool how easy this is to set up in Houdini.  I should have made the container bigger, as you can see the particles disappear when they hit the edges.

I have to say that rendering in  Mantra still confuses me.  The later frames were taking close to 3 hours to render...

Still, the simulation itself only took about half an hour to set up.