table, workbench, platforms and solid blocks all block this, you can see the open space they have chosen by where they stand at night. 178.141.117.149 19:07, 15 June 2011 (UTC) I think the reason some houses that seem valid are not working is that there is 1 additional requirement, the NPCs need an open space to stand. Peek at the code, anyone? Otherwise we can speculate forever.
!!Error: : Missing user name! On the other hand, 8x4 is enough for everyone on my latest world. I later built a bigger house, and she arrived the very instant I placed closed it with the door. All these houses I triple checked and they were good (1 was even taken by my merchant after he died and came back). Indeed, my dryad did not arrive, even though I had a several houses saved for her. Anyways, as soon as I made the rooms of my base 10x5 both, the dryad and the arms dealer moved in immediately.
Which is a problem if you need purification powder to break shadow orbs and don't want to use dynamite. But despite having a musket and killing EoC twice neither the dryad nor the arms dealer arrived. I built six houses, each 7x5 (9x7 inclusing the walls) and the guide, nurse, merchant and demolitionist each spawned and moved in their rooms. Blue Legion 06:46, (UTC) To me it seems, that NPCs have different requirements. Inside measurements of 8x4 always work for me, so the minimum must be less than 40 blocks. Looks like the size requirement is defined by the area of the free space inside of the house, which presumably should be no less than 40 blocks (for example, 10x4 worked for me non-rectangular works too, but needs more testing) 178.141.117.237 09:42, (UTC) Of course, this is the size as measured from inside. I keep seeing various numbers, sometimes including floor/roof and sometimes not.
Is 7x5 requirement true? I couldn't get any NPCs until i expanded my rooms to 8x5. I have rooms on my server map that attract NPCs just fine, yet lack doors. 28 My house is not considered valid housing.19 What do we mean by minimum size requirement?.16 Chairs: The Secret Destroyer of Homes.11 'Windows' in walls causing Monsters to spawn inside your house?.