I believe what rumpel is trying to say is, make many places in which the player may escape random spray, which in soldat tw, there will be. Also make trenches large enough to keep the gostek from being sniped or hit by spray if he is under such, a sandbag collider following, if you wish, and it'd be a good idea to make it mirrored, however not identical, remember in trenchwars there are no jets, so try to make the field so it's easy to run across but not one large flat plain.