Fluid simulation obstacles?

Hi!

How do I create an obstacle for my fluid simulation? I know how to create the fluid and the domain, but how does one add an obstacle? My goal is to add a couple of rocks into a river.

The obstacle mesh needs to be subdivided a few times or the fluid will pass right through it.

Have a look at this thread. Author gives a nice how-to.

https://blenderartists.org/forum/viewtopic.php?t=53563&highlight=fluid+tutorial&sid=34cc7e9fd528f1b607432bd1587db20f

Ok, thanks for the tip!