Just 'paint by numbers' really.

Seriously I don't think there's anything you could do short of witchcraft that would get Poser to have a body of water interact realistically with a figure.

Unless you were being sarcastic, in which case just push the 'Make Art' button and all your Poser dreams will come true.

If we can hit that bullseye, the rest of the dominos will fall like a house of cards...checkmate!