# Rain pooling: no input, the scene idles under the default rain (0.35).
# The field starts pre-filled (initial_pool 0.6): the deck DRAINS toward
# the river down to the drainage floor (0.15), the spawn bank tile sits
# on a long drainage path and rises as upstream water passes through,
# and the river stays pinned. The smog holds ~0.5 (the tuned shape:
# rain 0.35 scavenges only ~7%/day).
# frames: 1200
