And from this Tiro learns things such as the existence of hot tubs (he doesn't want one) and the thing about never writing something down in plaintext if you want to keep it secret from demons (which sounds potentially if not immediately useful), and then he asks for examples of especially interesting or striking interior design choices Cam has heard of.

Cam can produce hellish architecture photo books! Hell architecture is tacky but contains many redeemable individual elements.

Tiro turns out to have a real gift for picking out the best bits and synthesizing them into something delightful. He also enjoys this pastime immensely.

Yay! The house simulation becomes more interesting over time.

It's going to be so pretty! And he gives in to the temptation to ask for physical copies of all the books in the royal libraries and his family's personal collection, and designs an extension to the house to hold them all. It is bigger than the rest of the house. This is acceptable to Tiro.

"...I could just give you a computer."

"No, no, I want the computer too, the giant library in addition to the computer is pure personal indulgence, but I figure if I'm giving myself an entire mountain range for personal indulgence, adding a library isn't really a big deal."

"Sure." On goes the library addition. "I don't know whether to suggest you get the kind of computer I have, it requires a chip in your brain and I am slightly concerned you might explode again if I tried to give you one."

"A chip in your brain? What's it do?"

"It lets me direct the computer by thought! Other computers have to have stuff that you poke or talk to or whatever."

"That sounds really useful," he says. "...I mean at worst it would probably just be my head that exploded, right?"

"Are you expecting me to know how your explosion thing works?"

"No, I mean - if you didn't put anything anywhere other than my head, then it would only be my head that broke, and that's honestly the best kind of injury to have."

"Is it? Yeah, the chip is localized only to the head, doesn't need supplements anywhere else."

"Shattering hurts, regrowing hurts, and if I blow up it's always my head that comes back first, but if it's just my head then I'm unconscious for most of the growing-back part."

"Ah. Well, up to you if you want to risk it."

"...Maybe not right away."

"Sure."

"Thanks. So I think I might be done designing my house!"

"All right -" Cam drops the simulated house into the chosen spot in the simulated mountain range. "Here? Do you care where I put my house?"

"I dunno! Where do you want to put your house?"

"I was thinking up here -" Plop goes the architecture of Cam's house, non-black-hole-planetoid version - "by the crystal vein, but that's accessible for me, not as much for you since you don't have wings and that's another thing I don't know if you could have without exploding."

"...You know, even though it would probably be horrifyingly painful if it didn't work, I'm kind of really tempted to try wings!"

"I also don't know if you can have painkillers without exploding, the exploding thing is really kind of a problem!"

"I mean, my whole body won't shatter if part of me gets injured. Exploding only happens when there's, like, an explosion, and I am near it, and it explodes me."