Requirements For NPC To Teleport Into A Room:
(1) Fully enclosed by walls of any type.
(2) Summoning item - "Slime Oil" or "Mysterious Idol" (from defeating bosses).
(3) Bed - crafted (not "Caveling Bed").
(4) 1 empty tile of space - that includes no torches.
(5) Minimum floor space of 4 tiles (e.g. 2x2), as dictated by the above requirements.
(6) Max size 63 tiles (i.e. 8x8 - 1).
(7) Their existing bed is picked up (if there is one). Picking up only the summoning item or breaking a wall/door is not sufficient.
(8) Player moves away so that new room and NPC themself are entirely off the mini-map for some amount of time. 10 seconds seemed to do it for me, but it may be inconsistent, so try going further for longer if stuck.
Not Required:
(a) Door.
(b) Light source (NPCs have their own).
(c) Specific floor covering or wall type (natural dirt will suffice).
(d) Separate room - NPC will share, provided there's enough beds.
(e) Clean bed - it *can* be player's respawn point.
(f) Entirely solid floor - holes are fine, provided enough good floor space.
(g) Safety - room may contain enemies and their spawn surfaces (e.g. slime).
Advanced Tips And Tricks:
(i) Placing the summoning item in the doorway can let you past while blocking them in. They seem to have a bigger collision box. But it must be a side door with a clear tile above the Slime Oil/Mysterius Idol.
(ii) Spoiler for late game: NPCs can be summoned to the wilderness, then (given their immortality) used as a punching bag to hit a crit and trigger your Soul of Azeos Thunder Beam, which is able to break through Mould Dungeon walls. Credit: u/Vicidomini.
Reference Acknoweledgement And Links:
Fellow creatives, if this material inspires some of your content, I'd appreciate a quick shout-out and link back to this guide. 👍
Source: https://steamcommunity.com/sharedfiles/filedetails/?id=2793169894
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