Razor Panels: HTML/CSS UI with C# in s&box PanelComponent System
s&box Razor Panels use web-like HTML/CSS syntax with C# for UI creation. Panels are rendered natively (not via HTML renderer) — the syntax is a convenience laye…
Connection Class: Local, Host, All, Find, Permissions, Kicking, and Visibility Origins
Connection Class: Local, Host, All, Find, and Permissions represents a network connection to a player. It's the primary way to identify and interact with player…
BaseWeapon and BaseCarryable Weapon Framework
BaseWeapon and BaseCarryable - Weapon Framework Base classes for creating weapons in s&box. Provides ammo management, view/world models, and input handling. Bas…
Tracing - s&box Physics Documentation
Tracing Tracing (raycasting) is the primary way to query the physics world in s&box. It allows you to cast rays or shapes through the scene to find collisions w…
GameManager.Spawn RPC with Ident Parsing
GameManager.Spawn RPC Broadcast RPC for spawning entities from string identifiers with automatic weapon pickup detection. Ident Format - Spawn a prop from asset…
Particle Effect - s&box Documentation
Official s&box documentation for Particle Effects - visual effects system. Particle Effect creates visual effects using GPU-accelerated particles. The system su…
File System - s&box Assets Documentation
File System s&box provides several file systems for different purposes - data persistence, mounted content, and organization. File Systems Data File System For …
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…
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…
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…
Particle Effects System
Particle Effects System CPU-simulated, fully controllable particle system for effects like fire, smoke, sparks, and explosions. Architecture The particle system…
Physics joints — Fixed, Ball, Hinge, Slider, Spring, and Wheel
Physics Joints Joints connect two physics bodies together with constraints. All joint types are components added to a GameObject positioned at the joint's ancho…
VerletRope — rope physics with attachment, slack, and stiffness
VerletRope simulates rope physics using Verlet integration. The rope hangs from the GameObject's position and optionally attaches its end to another GameObject.…
Sandbox: BaseCarryable — unified AimRay, WeaponModel resolution, and seat-aware damage
BaseCarryable — Unified Weapon Base with AimRay and Seat Support is the root class for all holdable items. It handles viewmodel/worldmodel management, a unified…
s&box LineDefinition: Trail line resource
LineDefinition GameResource API Reference LineDefinition is a GameResource for trail line definitions used by the Trail tool. It implements IDefinitionResource …
ModelRenderer Material Overrides: MaterialOverride, SetMaterialOverride by Tag, Per-Index Materials Accessor, and Attachments
ModelRenderer Material Overrides: MaterialOverride, SetMaterialOverride, and Materials Accessor provides several ways to override materials on a model. Global M…
Clutter System — scattering grass, rocks, and debris with GPU instancing
Clutter System — Scattering Grass, Rocks, and Debris The Clutter System scatters large amounts of small objects (grass, rocks, debris) across a scene using GPU-…
Sandbox: Map entities — Door, Button, FuncMover, TriggerPush, TriggerTeleport
Sandbox Map Entities — Door, Button, FuncMover, TriggerPush, TriggerTeleport These components implement interactive map elements. They live in the namespace and…
Mapping - s&box Editor Documentation
Mapping s&box includes Hammer, the Source 2 level editor, for creating maps and environments. Build worlds with brushes, props, lighting, and gameplay entities.…
SpawnPoint and TriggerHurt — spawn locations and damage trigger volumes
SpawnPoint and TriggerHurt in s&box SpawnPoint is a built-in s&box component that marks a world location for player or NPC spawning. uses to find valid spawn lo…