s&box MCP Knowledgebase

Documentation, API references, code examples and community knowledge for s&box development.

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menu_bookDocumentation
May 4, 2026

Sandbox: Weld tool — FixedJoint constraint with EasyMode rotation

Sandbox Weld Tool — Constraint Creation with EasyMode Rotation The Weld tool creates constraints between two GameObjects. It has an EasyMode that lets the playe…

codeAPI Reference
May 3, 2026

ToolMode Base Class for Toolgun Modes

ToolMode Base Class Abstract base class for creating toolgun modes in s&box. Handles input registration, action dispatch, and HUD rendering. Class Overview Acti…

terminalCode Example
May 18, 2026

Randomized Clothing for NPC Citizens using Dresser.Randomize() on Prefabs

Overview This demonstrates how to create NPC citizen prefabs with randomized clothing using the built-in component. Each time the prefab spawns or is enabled, i…

menu_bookDocumentation
May 20, 2026

Custom GameResource Assets: Define, Create, and Access Custom Asset Types

Define custom asset types as subclasses. They get a nice inspector window, are hotloaded in-game, and are stored as JSON files with a custom extension. Creating…

codeAPI Reference
May 12, 2026

s&box WheelDefinition: Wheel type GameResource

WheelDefinition GameResource API Reference WheelDefinition is a GameResource that defines a wheel type with a prefab, used by the Wheel tool to spawn wheels. Ty…

menu_bookDocumentation
May 3, 2026

Decals in s&box

Decals in s&box Decals are textures projected onto surfaces for bullet holes, graffiti, scorch marks, etc. Decal Component Add to a GameObject: DecalDefinition …

codeAPI Reference
May 12, 2026

s&box ThrusterDefinition: Thruster type GameResource

ThrusterDefinition GameResource API Reference ThrusterDefinition is a GameResource that defines a thruster type with a prefab, used by the Thruster tool to spaw…

menu_bookDocumentation
May 3, 2026

Editor Tools

Editor Tools Create custom tools for the s&box editor. Creating a Tool Scene Access Gizmo Drawing Preventing Selection Overlay UI Editor Project Setup Tools mus…

menu_bookDocumentation
May 5, 2026

Storage UGC - s&box Assets Documentation

Storage UGC The Storage system manages user-generated content. Save games, player creations, and share to Steam Workshop. Creating a New Entry Create a storage …

terminalCode Example
May 3, 2026

Prefab Spawning and Cloning

Prefab Spawning and Cloning Prefabs are reusable GameObject templates that can be instantiated at runtime. Creating Prefabs Create a GameObject in the scene wit…

menu_bookDocumentation
May 5, 2026

Editor Shortcuts - s&box Editor Documentation

Editor Shortcuts Custom keyboard shortcuts make your editor tools more efficient. Shortcuts can be bound globally or to specific widgets. Creating a Static Shor…

codeAPI Reference
May 12, 2026

s&box BalloonDefinition: Balloon type GameResource

BalloonDefinition GameResource API Reference BalloonDefinition is a GameResource that defines a balloon type with a prefab, used by the Balloon tool to spawn ba…

codeAPI Reference
May 12, 2026

s&box HoverballDefinition: Hoverball type GameResource

HoverballDefinition GameResource API Reference HoverballDefinition is a GameResource that defines a hoverball type with a prefab, used by the Hoverball tool to …

codeAPI Reference
May 12, 2026

s&box PostProcessResource: Post-processing effect GameResource

PostProcessResource GameResource API Reference PostProcessResource is a GameResource that defines a post-processing effect with a prefab, used by the PostProces…

menu_bookDocumentation
May 3, 2026

Post Processing System

Post Processing System Add visual effects like bloom, tonemapping, and film grain with post-processing volumes. Overview Post processing in s&box uses a volume-…

terminalCode Example
May 3, 2026

Playing Sounds

Playing Sounds in s&box s&box provides both 2D and 3D sound playback through code and components. Quick Sound Playback Sound Handle Store the handle to control …

menu_bookDocumentation
May 5, 2026

Playing Sounds - s&box Sound Documentation

Playing Sounds s&box provides multiple ways to play audio. From simple one-shots to complex 3D spatial audio with full control. SoundEvent Create reusable sound…

menu_bookDocumentation
May 5, 2026

Animation - s&box Documentation

Animation s&box supports skeletal animation for characters and objects. Animate models using imported animations, blend between states, and control playback fro…

codeAPI Reference
May 3, 2026

Sandbox.GameResource

Sandbox.GameResource Base class for custom asset types. Overview GameResource is the base class for creating custom asset types that appear in the editor with f…

menu_bookDocumentation
May 3, 2026

Localization (i18n)

Localization (i18n) Support multiple languages using localization tokens. How It Works Use tokens starting with in UI strings. The system replaces them based on…