Prototype #3 was a test of physics-based implementation of movement through the water. We used the same scene as #2.
This experiment involved tracking the two oars we had created for the boat, and monitoring when they were in water. Beyond that, it was a (relatively) simple case of reflecting boat movement in whichever way the oars had moved. Again, this worked surprisingly well. We also ran into an incredible bug whereby if water friction was too low, and you could really ramp up quite horrifying speeds. It was fun, though!