Foul poles -- above surrounding fenceline is a home run. Below surrounding fenceline is in play.
Ball going into dugout, camera bays or hitting padded protective railings along dugout is out of play.
Ball hitting guy wires supporting backstop screen is the same as ball going into stands.
Batted or thrown ball that hits tarpaulin area cover is in play.
Thrown ball lodging in or under backstop protective canvas and remaining: 2 bases; Pitched ball: 1 base.