3-tall door

block survival:door-1x3gate-aged · from game

Can be generated by (1)

Random-stack placeholders (placed in world-generated chests and similar) whose pool includes this. The chance is among that placeholder's results, not the chance of finding it.

Placeholder	Chance
Lantern randomizer	7.09%

Found in structures (19)

Structure	Kind
Devastation area	storystructure
Lazaret area	storystructure
resonancearchiveentrance	hookgenerated
Resonance Archive	storystructure
Tobias cave area	storystructure
Village area	storystructure
underground-verycommon	structure
underground-uncommon	structure
underground-translocator-uncommon	structure
underground-rare	structure
shoppingcentre	storystructure
sunrift	storystructure
university	storystructure
megastructures-normancastle-par	structure
megastructures-giantcathedral-dampus	structure
village-femursnapper	village
largeruins-0604-sirayne-o7	structure
largeruins-1001-ace-roadsideinn-largeruin-o6	structure
desertspecifc-wildwest1-virrno-o4	structure

This confirms the schematic(s) contain this code somewhere, not where or how many times -- the per-instance block-entity decoding used for tapestries isn't run for every content type.