And if you really wanted to go crazy, you could use a fluid container instead of a geoCube. That'd allow you to get 'properly' simulated ripples. I'd start with a cube as well though, and only towards the end decide if I REALLY need to simulate. But using the dipped-modeled floor as a fluid colider, though sometimes tricky to get perfect, can get some pretty neat results. I did a little lava simulation a while back