"Monsters aren't animals?"

"Not unless you consider skeletons, ghosts and floating robot eyeballs animals."

"...wow, okay, I admit those do not sound like animals."

"Yeah, some monsters are, like the giant spiders and giant hornets. They're in the minority though. Undead are one of the larger categories especially if you combine spirits into that. And then there's weirder stuff like all the flying eyeballs; robot and otherwise."

"Where'd those come from?"

"They were invented by the Logic. It's possible they were inspired by something else but I don't know what if so. My siblings and I tweaked a lot of the monsters to make them a harder but fairer challenge, especially the bosses. There was a lot more randomness in the Logic's original design."

"Huh. Why'd the Logic do it that way?"

"Randomness is a faster path to variety than carefully designing things is. It also doesn't require synchronization."

"Huh. I guess that makes some sense."

"Yep, generally the worldseeds fill in details but for structured entities like my world's monsters someone has to specify how they behave."

"How do they fill in details?"

"The central example is that they can extrapolate an illustration into a three dimensional object. They can also create full people from a relatively minimal outline of their personality and other traits. I can come up with more if that's not enough to get the idea."

"Whoa, that's... creepy and cool... what are people created that way like?"

"It depends... if you have enough of them or enough other background to justify why there's only a few then they can be pretty much normal... insofar as someone as weird as me knows what a normal person is like. If you're having the worldseed paper over obvious gaps they just don't hear you when you say certain things and if you push them they either get mad or just forget part of the conversation. It can be pretty jarring. That's why we use scenery instead of instantiated for things that look like people in Terraria."

"Scenery?"

"Yeah, that's what I call it when you have something that looks like a person but only ever says things you came up with for them to say and only does things you came up with for them to do."

"- oh, like, an NPC."

"Yeah, people do use that term, but sometimes they mean anyone who isn't a visitor so I prefer scenery."

"I guess that's a distinction you'd have to make if there's also some who have, like, feelings and stuff, yeah."

"Yeah, it probably doesn't help that my siblings and I made scenery that can stand in for us when we're busy with other things and that sometimes we take on other roles usually filled by scenery... people get pretty confused."

"- yeah, I guess that would look like the same person sometimes being livelier than other times?"

"Yep, pretty much. Anyway, I'm happy to keep talking about this if you like but we have gotten a bit distracted from the teleporters you sounded so interested in."

"Oh, right, I don't personally need them in my day to day but some people would love them. You're already going to Hereafter though and that's where all the businessy people are."

"I'll make sure to mention it then."

"They'll be thrilled. They'll all be able to go on day trips to music festivals and get home to get back to all their important work."