Flowing water tiles

What Feature would you like to see included within TaleSpire?
A water tile containing an animation loop of water flowing in a direction. Current water tiles reflect relatively still water. By using a tile (depicted in edit mode with an arrow) which has a water animation flowing it would be possible to roughly simulate rivers. Having a similar tile with a rapid downwards animation loop could allow a useful effect for waterfalls.

What situations would this Feature be useful?
Waterfalls, rivers, sewers, streams, canals, aqueducts

Additional Thoughts/Details