Content map: where things live

QZSim/Content is huge; most of it is base-game art and MetaHuman assets you will never need to touch. The largest folders are Art/ and MetaHumans/.

Folder	What is inside	Modder relevance
Data/	All gameplay data assets: Symptoms, Tools, Companies, Profiles, BaggageItems/Contraband, Handbook, GeneratorApperance (visitor look), Levels, DaysConfigs, loss rules	copy as template: the main modding hub
Blueprints/	Gameplay logic by system: AI, GameFlow, GameModes, Gameplay, KPP (checkpoint/inspection interactions), Tools (handheld tool actors), Weapon, Quests, Defence, Evacuation, Player	reference. Tools/ is commonly paired with a tool mod. Child Blueprints of base gameplay classes are possible (bed, cat, tools) but can break when the base Blueprint changes
UI/	UMG widgets by feature: HUD, Menu, Tablet, DayReport, Defence, Tutorial, etc.	reference; your own widgets can embed base widget elements
Maps/	Level .umap files: Chekpoint, Checkpoint_Miami, Intro, Menu, PreMenu, Dev	copy a gameplay level as a template for your campaign map (plus a QzLevelDataAsset)
Audio/	SoundCues and SoundClasses per NPC, creature, tool, ambience, voice	reference / copy as template
Characters/	Base skeletons, mannequins, first-person arms, shared animations	reference
Art/	Base-game meshes, textures, environments, VFX, props, destructibles	reference only; huge, browse for source assets
MetaHumans/	About 90 premade MetaHuman folders (Female01-30, Male01-30, named unique NPCs) used by the visitor generator and NPC profiles	reference: source characters, do not edit in place
UltraDynamicSky/	The game's sky and weather system; weather presets are in UltraDynamicSky/Blueprints/Weather_Effects/Weather_Presets	pick presets for the Weather day modifier
Movies/	Video clips used by the game (tutorial and hint videos)	reference
Localization/ + L10N/	Source string tables and compiled per-language output	ignore: regenerated by the engine; mods ship their own strings
Materials/, Textures/ (top level)	Shared base materials, functions and instances, and a secondary loose-textures folder (separate from Art/Textures)	reference
DBD/, FpsAnimationBundle/, UltraVolumetrics/, AutoEnvTools/, MiamiPrototype/, Sequencer/, Sounds/, CreditsSystem/, Splash/, Tables/, Dev/, Developers/, Editor/, Collections/, __ExternalActors__/	A crossover bundle, marketplace plugins (volumetrics, environment tools), an animation pack, dev/prototype sandboxes, developer folders, cinematics, credits/splash, and the engine-managed One File Per Actor folder (__ExternalActors__, never edit directly)	ignore for modding

Where to find the base asset to copy

• Visitor appearance (GeneratorApperance, keyed by GameplayTag, see Config/Tags/Generator.ini): Data/GeneratorApperance/{Bodies,Clothing,ColorSets,DNA,Glasses,Hair,Hats,Mutations,OtherAccessory,SkinOverlay,Skins}. Duplicate an existing DA_* in the matching subfolder. A duplicate replaces the base item; to add a new one, see Visitor appearance.
• Checkpoint staff skins (QzStaticNPCSkinDataAsset): no base asset ships in Content. Create one inside your mod's Content/ (Content Browser → Add → Miscellaneous → Data Asset → QzStaticNPCSkinDataAsset, one asset per NPC tag). Replacement is the only supported path, for the 5 fixed tags (NPC.Skin.Doc/Usmon/UsmonWhite/Military/Scientist).
• Symptoms (QzSymptomDataAsset): Data/Symptoms/Items/. Subfolders: Animations, Breath, Custom, Dog, Electroshock, Eye, Hammer, Mathioscope, Multitool, Organs, Skin, UV, UVStick, Worms; the assets at the top of Items/ are named by kind (DA_Symptom_Disease_*, DA_Symptom_Mixed_*, DA_Symptom_Virus_*). Section grouping is in Data/Symptoms/Sections/DA_SymptomSection_*.uasset.
• Tools (QzToolDataAsset): Data/Tools/DA_*.uasset (Hammer, Scanner, Stethoscope, Syringe, UVStick, XRay, Multitool, Matioscope, Electroshock, DogTool, Pistol, Wanted). Pair with the actor Blueprint in Blueprints/Tools/<ToolName>/.
• Maps (QzLevelDataAsset): Data/Levels/DA_LevelChicago.uasset and DA_LevelMiami.uasset; the referenced levels live in Maps/.
• Companies / campaigns: Data/Companies/{Chicago,Miami,Endless_Chicago,Debug}/DA_Company*.uasset, each with a Days/ subfolder.
• Loss rules (LossConditionsDataAsset): Data/DA_LossGameV2.uasset and Data/DA_LossGame_Miami.uasset.
• Visitor profiles: Data/Profiles/DA_NPC*.uasset as generic templates, Data/DaysConfigs/Profiles/ for per-campaign sets.
• Baggage / contraband: Data/BaggageItems/DA_BaggageItems_<Category>.uasset (visible items), Data/HiddenContraband/ and Data/InternalContrabands/ (hidden/internal).
• Handbook: Data/Handbook/DA_Handbook_Chicago.uasset and DA_Handbook_Miami.uasset.

note

Third-party (Fab / Marketplace) assets in the kit are cooked and read-only. See Cooked content limitations.