Show behind the scene on "Novel Waterman" MV. The process is, setup animation and create the particle on surface (Human and Guitar), Import all of particles from Maya to RealFlow Program. Using the Eventscript in RealFlow(Python Script Programming) for inherit "Position" and "Velocity" of particles from Maya to create the new particle set in RealFlow. So every frame on processing in RealFlow, I have particle of RealFlow are moved along Particle from Maya. And I use programming logic statement (if-statement) to check collision with the object in the scene or specificed frame to make some particle not move along particle from Maya but go to interact to other particle set in RealFlow instead or can emit the new particle in RealFlow.