Inkorporated - Custom Tattoos for Schedule I

🛟 Need help or found a bug? Get support at support.doodesch.de.

The tattoo framework for Schedule I. Inkorporated lets mods add their own PNG tattoos to the in-game tattoo shop - drop a pack folder, or register via the API - and the game treats them exactly like vanilla tattoos: they render on the avatar, persist in saves and sync in co-op. Built on S1API.

Inkorporated is primarily a library / dependency. On its own it adds no tattoos - it's the thing tattoo packs depend on. Install it alongside a tattoo pack (or flip on the bundled example pack) and the new tattoos show up in the tattoo shop under their placement category (Chest, Left/Right Arm, Face).

Documentation & example

• 📖 Wiki - the full guide for making tattoos: pack format, the API, authoring + UV alignment, multiplayer/NPCs, troubleshooting.
• 🧩 Example repo - a working, copy-me template showing both routes side by side: a no-code content pack and a code mod using the API.

Features

• Real tattoos, not decals. Each custom tattoo is registered as a proper avatar layer through the game's own Resources.Load pipeline, so it renders, saves, and syncs in multiplayer just like a built-in tattoo (any client with the same mod + pack sees it; others simply don't render it - no crash).
• Two ways to ship tattoos - a drop-in pack folder (PNGs + a tiny manifest.json, no code), or a C# API for code mods that build textures at runtime.
• All placements: chest, left arm, right arm and face.
• No asset bundles, no engine patching. Custom textures are loaded from PNG at runtime and wrapped into cloned avatar layers - nothing to cook in Unity.
• Bundled example pack (off by default) gives players a few ready-made tattoos and authors a working template to copy.

Requirements

Component	Version / Source
Schedule I	IL2CPP (current Steam public build)
MelonLoader	0.7.3+
S1API	ifBars/S1API_Forked (Resources registry, avatar layer factory)
Mod Manager & Phone App	Nexus mods/397 - optional, for the in-game settings UI

Installation

Recommended: a Thunderstore mod manager

Install with r2modman / Gale from the Schedule I community; the dependencies (MelonLoader, S1API) are pulled in automatically. Then install any tattoo pack that lists Inkorporated as a dependency.

Manual

1. Install MelonLoader 0.7.3 for Schedule I.
2. Install S1API (its DLLs go in Mods/ and Plugins/ per its own instructions).
3. Drop Inkorporated.dll into your Schedule I Mods/ folder.
4. Add tattoo packs (see below), or enable the bundled example pack (see Configuration).

For players: using tattoo packs

A tattoo pack is just a folder under:

<Schedule I>/UserData/Inkorporated/Packs/<PackName>/

containing a manifest.json and the PNGs it lists. Mod managers that target this path install packs for you. To see the format, turn on the bundled example pack (Configuration below) and look in UserData/Inkorporated/Packs/Examples. Custom tattoos then appear in the tattoo shop, free by default.

For pack authors: the pack format

Create UserData/Inkorporated/Packs/<YourPack>/manifest.json:

{
  "name": "My Pack",
  "author": "you",
  "tattoos": [
    { "id": "skull", "name": "Skull", "placement": "chest", "file": "skull.png" },
    { "id": "tear",  "name": "Teardrop", "placement": "face", "file": "tear.png", "price": 250 }
  ]
}

• placement: one of chest | leftarm | rightarm | face.
• price: optional; omit or 0 for "Free".
• file: PNG filename relative to the pack folder (defaults to <id>.png if omitted).
• id: unique within your pack.

Authoring the PNGs (important)

A tattoo is a full UV-space skin texture, not a sticker placed in a box. The body shares one UV unwrap (torso + both arms + legs), the face has its own. Your design's opaque pixels must sit at the UV coordinates of the body part you want - everything else transparent. Get this wrong and the ink lands on the wrong limb.

• Recommended canvas: 2048x2048 for body/arms, 512x512 for face (matches the built-ins). Size only affects sharpness, not placement; there is no size cap - you can paint a whole arm sleeve or a full back piece by covering that region's UV.
• Use the built-in tattoos as alignment references. A DEBUG build of Inkorporated exports every built-in tattoo texture to UserData/Inkorporated/Templates/ - paint over those to line your art up.

For mod developers: the API

Reference Inkorporated.dll and register early (e.g. in your OnInitializeMelon), before the tattoo shop UI is built. Tattoos registered later appear the next time that UI is rebuilt.

using Inkorporated;                 // API
using Inkorporated.Model;           // TattooPlacement

// From an already-loaded texture:
API.RegisterTattoo("skull", "Skull", TattooPlacement.Chest, myTexture2D, price: 0f, source: "MyMod");

// From a PNG on disk (loaded lazily when first needed):
API.RegisterTattooFromFile("tear", "Teardrop", TattooPlacement.Face, pngPath, source: "MyMod");

// From a PNG embedded in your own DLL (no loading boilerplate - caller assembly is auto-detected):
API.RegisterTattooFromResource("rose", "Rose", TattooPlacement.LeftArm, "MyMod.Assets.rose.png", source: "MyMod");

TattooPlacement = Chest | LeftArm | RightArm | Face. source namespaces your ids (used for de-duplication and the registered resource path). Because tattoos register through Resources.Load, the same custom path also works for S1API NPC appearances (WithBodyLayer/WithFaceLayer) - just register before the NPC's appearance is applied. On Thunderstore, list DooDesch-Inkorporated as a dependency.

Configuration

Settings live in the Mod Manager & Phone App UI in-game, or in UserData/MelonPreferences.cfg under Inkorporated_01_Main.

Setting	Default	What it does
LoadExamplePack	false	When on, drops the bundled example pack into UserData/Inkorporated/Packs/Examples on startup (if not already there) - a few ready-made tattoos plus a folder/manifest template to copy. Requires a game restart. Never overwrites an existing Examples folder.

How it works

For each custom tattoo, Inkorporated loads the PNG into a Texture2D, clones a built-in AvatarLayer of the matching placement (via S1API's AvatarLayerFactory) with the texture swapped in, and registers it at a custom Resources path (S1API's RuntimeResourceRegistry patches Resources.Load). The shop buttons are added by cloning an existing option in the tattoo-shop UI. From there the game's own avatar pipeline loads, renders, saves and networks the tattoo like any vanilla one - which is why no asset bundles or render hooks are needed.

Compatibility

• IL2CPP build only (current Steam public branch).
• Multiplayer: custom tattoos are transmitted as their resource-path string. Every player needs Inkorporated and the same pack for them to render on each other; players without it simply don't show that tattoo (no desync, no crash).

Credits

• DooDesch - mod author.
• ifBars/S1API - the modding API this is built on (texture/avatar-layer helpers + the Resources registry that make custom tattoos possible).
• Prowiler - Mod Manager & Phone App (in-game settings UI).

License

Provided as-is under the MIT License.