medium

structure survival:undergroundruin · from game

Spawn conditions

Condition	Value	What this means
Spawn chance	50 (relative weight, not a percentage)	How likely this is attempted at a given candidate location/chunk/attempt, before any global frequency multiplier from world-creation settings. When several entries share the same code (e.g. a structure's small/medium/large size variants), this is actually a relative weight among those siblings rather than an independent probability -- confirmed real game data has values over 1 in exactly that case, so a value like 130 isn't a literal 13000%.
Placement	underground	Where this is anchored: on the terrain surface, buried underground, or a specific ruin/story layer.

Schematics

The block layouts this structure can place. Each links to its own schematic page and can be opened in the 3D viewer.

underground/medium/*

Schematic	Size (X×Y×Z)	Distinct block codes	3D
underground/medium/m-art-treasury	11×7×9	34	View
underground/medium/m-kitchen1	16×12×12	50	View
underground/medium/m-kitchen2	15×12×18	58	View
underground/medium/m-kitchen3	10×10×13	33	View
underground/medium/m-knowledge-base	12×13×10	41	View
underground/medium/m-laboratory	14×11×12	43	View
underground/medium/m-laundry1	11×8×14	40	View
underground/medium/m-medical1	11×7×14	39	View
underground/medium/m-mistery-grave	10×8×13	30	View
underground/medium/m-noble-room	16×8×16	60	View
underground/medium/m-noble-scriber	14×8×12	40	View
underground/medium/m-outlaw-hoarders	14×12×15	55	View
underground/medium/m-shelter-1	21×15×14	45	View
underground/medium/m-shelter1	21×15×14	45	View
underground/medium/m-shelter2	16×10×16	45	View
underground/medium/m-storage1	12×8×13	35	View
underground/medium/m-workshop1	13×8×12	32	View