Any thoughts on allowing players to ford streams/rivers or underground areas that are knee/waist/chest deep in water?
Apart from it being visually interesting and possibly scary at times, it could allow for a variety of aquatic encounters to take place.
For example, if the party has no choice but to cross a waist deep stream on foot, they might become targets for electric eels, snakes, and "bitey" fish like piranhas.
Or in subterranean lakes, aboleths, aquatic undead, frog-men, and all manner of amphibious creatures.
Obviously, the engine would need to handle the visual complexity of water and water-combat, but it could open up additional adventuring possibilities previously unavailable in IE games.
Do we need this in P:E ?