s&box MCP Knowledgebase

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

library_books 595 entries menu_book 352 Documentation code 133 API Reference terminal 100 Code Example groups 10 Community
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menu_bookDocumentation
May 20, 2026

Video: VideoPlayer Decoding and VideoWriter Encoding with Streaming Support

s&box provides VideoPlayer for decoding video and VideoWriter for encoding video frames. VideoPlayer Decodes video files or URLs, exposing the current frame as …

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-…

menu_bookDocumentation
May 20, 2026

Creating Terrain: Heightmap Setup, World Scale, and Asset Reuse

To add Terrain to your s&box scene, right-click in the Hierarchy and select 3D Object → Terrain. The inspector prompts you to create, import, or link an existin…

terminalCode Example
May 12, 2026

s&box DemoRecording with DefaultMovieRecorderOptions

s&box DemoRecording with DefaultMovieRecorderOptions This example shows how to configure s&box's MovieRecorder system using the [DefaultMovieRecorderOptions] at…

codeAPI Reference
May 12, 2026

s&box Ownable: Ownership tracking component

Ownable Component API Reference Ownable is a Component that tracks which Connection (player) spawned a GameObject, enabling prop protection and ownership checks…

codeAPI Reference
May 12, 2026

s&box EmitMode: Emitter firing mode

EmitMode Enum API Reference EmitMode is an enum that defines how an emitter fires - either toggling on/off with a press, or emitting only while input is held do…

menu_bookDocumentation
May 5, 2026

Execution Order - s&box Documentation

Execution Order Understanding the order in which component methods are called. Flowchart Component lifecycle follows a specific order: Constructor — Object crea…

menu_bookDocumentation
May 3, 2026

Shaders in s&box - HLSL and Shading Models

Shaders in s&box - HLSL and Shading Models Write custom shaders in HLSL with Source 2's shading models, render states, and GPU instancing support. Shader Develo…

groupsCommunity
May 4, 2026

Sandbox: Full codebase architecture — systems, player components, weapons, tools, NPCs

Sandbox Codebase Architecture Overview The Facepunch Sandbox game is a large reference implementation. Here's a map of the major systems and how they connect. C…

menu_bookDocumentation
May 12, 2026

s&box GamePreferences: User preferences

GamePreferences Static Class GamePreferences is a static class that defines the local user's preferences for the game. These ConVars control player-specific set…

menu_bookDocumentation
May 12, 2026

s&box WeaponConVars: Global weapon settings

WeaponConVars Static Class WeaponConVars is a static class that defines console variables controlling global weapon behavior in s&box. These ConVars can be set …

menu_bookDocumentation
May 20, 2026

Serverside Code: #if SERVER Blocks and .Server.cs Files for Hidden Logic

s&box supports serverside-only code that is stripped from client builds. This only works when running local projects on dedicated servers. #if SERVER Blocks Cod…

groupsCommunity
May 5, 2026

s&box built-in component quick reference — rendering, physics, navigation, UI, and audio

s&box Component Quick Reference A cheat sheet of the most commonly used built-in components and what they do. Rendering Lighting Physics Navigation UI Audio Gam…

terminalCode Example
May 5, 2026

ConVar and ConCmd — console variables and commands with flags and game settings

ConVar and ConCmd — Console Variables and Commands and are s&box attributes for exposing variables and commands to the developer console. Console Commands Conso…

codeAPI Reference
May 4, 2026

s&box Game Static Class: Core Game State and Operations

s&box Game Static Class: Core Game State and Operations The static class provides global access to core game state, utilities, and operations. Scene Management …

codeAPI Reference
May 12, 2026

s&box ScriptedEntity: Custom entity GameResource

ScriptedEntity GameResource API Reference ScriptedEntity is a GameResource that defines a spawnable entity with a prefab, used by the spawn menu to create custo…

menu_bookDocumentation
May 5, 2026

GameObjectSystem — scene-wide systems with stage-ordered execution and static access

GameObjectSystem — Scene-Wide Systems is a base class for scene-level systems that need to run at specific points in the frame — before or after physics, render…

menu_bookDocumentation
May 20, 2026

Dedicated Server User Permissions: Claims-Based Access Control via Steam ID

On s&box Dedicated Servers, you can specify admin permissions per user via the file using Steam IDs and claims. Configuration Claims Claims are strings describi…

menu_bookDocumentation
May 20, 2026

MusicPlayer: Streaming Audio with Visualization and World-Space Positioning

in s&box handles music tracks and streaming audio with programmatic control over playback, positioning, and visualization. For sound effects, use the Sound syst…

menu_bookDocumentation
May 4, 2026

Networking State in s&box: IsHost, IsClient, IsActive, and Lobby Management

Networking State in s&box: IsHost, IsClient, IsActive Understanding the networking state is critical for writing correct multiplayer code in s&box. Key Properti…