I was tired of looking at placeholder water, so I gave the dam and island rivers a proper editing pass.
There are now five editable river branches around the dam, lake and outlets. The reservoir, Los Pantanos and the sea have their own water materials, and I shaped a bed under the western outlet so it meets the terrain more convincingly.
The sharp drops still need help. So do the banks, foam, rocks, plants and sound. I haven't tested currents or buoyancy, which means this photograph is not evidence that Bonita can take her pontoons through the swamp.
Speaking of the swamp, I've picked a sheltered pocket in Los Pantanos for a delivery idea: little inhabited islands, awkward wooden links and a reason to bring the pontoons. The location is chosen. The houses and route are still design work, not a built level.
At least the water now gives me something better than a blue placeholder to work against.