Use your mouse to play with water I tried to make it as realistic as possible, behaving how a real fluid would. One thing that made it substantially more realistic was making the water affected by the mouse's velocity, not just distance. You'll notice that the faster you move your mouse, the bigger an impact it has. Since the mouse is basically just treated as another water particle, this could easily be implemented per water drop, but I felt that this was realistic enough. I might try it in the future though.