Parallel drainage pattern. A parallel drainage system is a pattern of rivers caused by steep slopes with some relief. Because of the steep slopes, the streams are swift and straight, with very few tributaries, and all flow in the same direction.
1 In Creative, the player can use spawn eggs to spawn most mobs. 2  When mobs are spawned this way, all normal spawning requirements, such as light level and block type, are ignored. 3  Any entity can be spawned using the /summon command.
1 Answer 1. active oldest votes. up vote 20 down vote accepted. What blocks immediately neighbor the spawner is irrelevant, it will still try to spawn mobs across its area of influence.Spawners place mobs at three levels - one below, the level of the spawner, and one above, and can spawn mobs in the air.