Originally posted by Username:

Originally posted by Sonaut:

all those spawn blocking objects work, but spawns may slip through before the object has loaded in.

Exact this

I'm inclined to agree too. When portalling in to my biggest base, there are occasions I've immediately heard the sounds of monsters or wild animals well before the teleportation cloud effect is done. That implied to me that things are spawning very early in the loading process. Which seems odd to me, if anything I'd expect that to happen last or near last.