opendcl

Enable the visual editor in a Decentraland scene with translate/rotate gizmos. Adds click-to-select, drag-to-move arrows, drag-to-rotate rings, plane handles, wireframe selection box, and UI overlay. Auto-discovers all entities declared in main-entities.ts. Use when user wants to enable the editor, add gizmos, edit the scene interactively, or tweak object positions and rotations in preview.

Add 3D models (.glb/.gltf) to a Decentraland scene using GltfContainer. Covers loading, positioning, scaling, colliders, parenting, and browsing 5,700+ free assets from the OpenDCL catalog. Use when the user wants to add models, import GLB files, find free 3D assets, or set up model colliders. Do NOT use for materials/textures (see advanced-rendering) or model animations (see animations-tweens).

Add click handlers, hover effects, pointer events, trigger areas, raycasting, and global input to Decentraland scene entities. Use when the user wants to make objects clickable, add hover effects, detect player proximity, handle E/F key actions, or cast rays. Do NOT use for advanced input patterns like movement restriction, cursor lock, or WASD control (see advanced-input). Do NOT use for screen-space UI buttons (see build-ui).

Advanced input handling in Decentraland. PointerLock (cursor capture state), InputModifier (freeze/restrict player movement), PrimaryPointerInfo (cursor position and world ray), WASD keyboard patterns, and action bar slots. Use when the user wants movement restriction, cursor control, FPS controls, input polling, or cutscene freezing. Do NOT use for basic click/hover events on entities (see add-interactivity).

Advanced rendering in Decentraland scenes. Billboard (face camera), TextShape (3D world text), PBR materials (metallic, roughness, transparency, emissive glow), GltfNodeModifiers (per-node shadow/material overrides), VisibilityComponent (show/hide entities), and texture modes. Use when the user wants billboards, floating labels, 3D text, material effects, glow, transparency, or model node control. Do NOT use for screen-space UI (see build-ui) or loading 3D models (see add-3d-models).

Animate objects in Decentraland scenes. Play GLTF model animations with Animator, create procedural motion with Tween (move/rotate/scale), and chain sequences with TweenSequence. Use when the user wants to animate, move, rotate, spin, slide, bob, or create motion effects. Do NOT use for audio/video playback (see audio-video).

Read real-time amplitude and 8-band frequency data from any AudioSource, AudioStream, or VideoPlayer entity in a Decentraland SDK7 scene with the AudioAnalysis component. Renderer fills the component each frame; scenes copy values into a plain JS view via readIntoView/tryReadIntoView and drive entity scale, color, lights, materials, particles, or UI from amplitude (overall loudness) and bands[0..7] (low→high frequency bins). Use when the user asks for music visualizers, beat reactivity, audio-reactive scenes, equalizers, dancing lights, scaling cubes that pulse to music, audio-driven materials, or anything that should react to sound. Do NOT use to play sound (see audio-video) or to detect player-emitted audio (this reads only entity-attached AudioSource/AudioStream/VideoPlayer audio).

Add sound effects, music, audio streaming, and video players to Decentraland scenes. Covers AudioSource (local files), AudioStream (streaming URLs), VideoPlayer (video surfaces), video events, and media permissions. Use when the user wants sound, music, audio, video screens, radio, or media playback. Do NOT use for 3D model animations (see animations-tweens).

Build 2D screen-space UI for Decentraland scenes using React-ECS (JSX). Create HUDs, menus, health bars, scoreboards, dialogs, buttons, inputs, and dropdowns. Use when the user wants screen overlays, on-screen UI, HUD elements, menus, or form inputs. Do NOT use for 3D in-world text (see advanced-rendering) or clickable 3D objects (see add-interactivity).

Control camera behavior in Decentraland scenes. CameraMode detection, CameraModeArea (force first/third person in regions), VirtualCamera (cinematic scripted cameras), MainCamera (read position/rotation), and camera-triggered events. Use when the user wants camera control, cutscenes, cinematic views, forced camera modes, or camera tracking. Do NOT use for input restriction during cutscenes (see advanced-input for InputModifier).

Scaffold a new Decentraland SDK7 scene project. Creates scene.json, package.json, tsconfig.json, and src/index.ts. Covers scene.json schema (parcels, spawnPoints, permissions, featureToggles), multi-parcel layouts, and project structure. Use when the user wants to start a new scene, create a project, or set up from scratch. Do NOT use for deployment (see deploy-scene or deploy-worlds).

Deploy a Decentraland scene to Genesis City (LAND-based). Covers pre-deployment checklist, scene.json validation, spawn points, and common deployment errors. Use when the user wants to deploy, publish, go live, or upload to parcels they own. Do NOT use for Worlds deployment (see deploy-worlds).

Deploy a Decentraland scene to a World (personal 3D space using a DCL NAME or ENS domain). Covers worldConfiguration setup, Places listing opt-out, and common deployment errors. Use when the user wants to deploy to a World, publish to a personal space, or use a DCL NAME/ENS domain. Do NOT use for Genesis City LAND deployment (see deploy-scene).

Plan and design Decentraland games and interactive experiences. Scene limit formulas, performance budgets, texture requirements, asset preloading, state management patterns (module-level, component-based, state machines), object pooling, UX/UI guidelines, input design, and MVP planning. Use when the user wants game design advice, scene architecture, performance planning, or help structuring a game. Do NOT use for specific implementation (see add-interactivity, build-ui, multiplayer-sync).

Dynamic lighting and environment in Decentraland scenes. LightSource (point and spot lights), shadows, SkyboxTime (day/night cycle), realm detection, and emissive materials for glow effects. Use when the user wants lights, shadows, skybox control, day-night cycle, or glowing materials. Do NOT use for PBR material properties like metallic/roughness (see advanced-rendering).

Synchronize state between players in Decentraland using CRDT networking (syncEntity), MessageBus, fetch, signedFetch, and WebSocket. Use when the user wants multiplayer, synced entities, shared world state, real-time networking, or player-to-player communication. Do NOT use for server-authoritative multiplayer with anti-cheat (see authoritative-server). Do NOT use for screen UI (see build-ui).

NFT display and blockchain interaction in Decentraland. NftShape (framed NFT artwork), wallet checks (getPlayer, isGuest), signedFetch (authenticated requests), smart contract interaction (eth-connect, createEthereumProvider), and RPC calls. Use when the user wants NFTs, blockchain, wallet, smart contracts, Web3, crypto, or token gating. Do NOT use for player avatar data or emotes (see player-avatar).

Create NPCs (non-player characters) in Decentraland scenes. Two approaches: the NPC Toolkit library (dcl-npc-toolkit) for GLB-based NPCs with built-in dialogue, movement, and state machines; and AvatarShape for avatar-look NPCs dressed in wearables. Use when the user wants to add an NPC, character, shopkeeper, quest giver, guard, or any non-player entity with behavior or dialogue. For live player data (position, profile, wearables) see player-avatar instead.

Optimize Decentraland scene performance. Scene limit formulas (triangles, entities, materials, textures, height per parcel count), object pooling, LOD patterns, texture optimization, system throttling, and asset preloading. Use when the user wants to optimize, improve performance, fix lag, reduce load time, check limits, or reduce entity/triangle count. Do NOT use for deployment (see deploy-scene).

Emit particles (fire, smoke, sparks, snow, magic, fireworks) from an entity in a Decentraland SDK7 scene with the ParticleSystem component. Covers emitter shapes (Point, Sphere, Cone, Box), continuous rate vs Burst emission, lifetime/size/color/velocity ranges, gravity and additionalForce, blend modes (ALPHA/ADD/MULTIPLY), billboard and faceTravelDirection, sprite-sheet texture animation, simulation space (local vs world), playback state, and per-scene particle budget. Use when the user asks for particles, sparks, fire, smoke, dust, fog, fireworks, magic effects, snowfall, rain, embers, trails, or atmospheric effects. Do NOT use for procedural entity motion (see animations-tweens), GLTF model effects (see add-3d-models), or 2D UI effects (see build-ui).

Player and avatar system in Decentraland. Read player position/profile, customize appearance (AvatarBase), trigger emotes (triggerEmote/triggerSceneEmote), read equipped wearables (AvatarEquippedData), attach objects to players (AvatarAttach), create NPC avatars (AvatarShape), avatar modifier areas, and locomotion settings. Use when the user wants player data, emotes, wearables, NPC avatars, avatar attachments, or movement speed changes. Do NOT use for wallet/blockchain interactions (see nft-blockchain).

Apply physics forces to the player in Decentraland scenes. Impulses (one-shot pushes), knockback (push away from a point with falloff), continuous forces (wind tunnels, anti-gravity, lift, levitation, hover), timed forces, and repulsion fields. Use when the user wants launch pads, knockback on hit, wind zones, gravity fields, jumps, lifting/floating the player, pushing the player up/sideways/back, hover effects, or any scene-applied force on the player. THIS is also the right skill when an agent's first instinct is to mutate `Transform` on `engine.PlayerEntity` to move/lift/push the player — that does NOT work (the player Transform is engine-controlled and read-only); use the Physics API instead. Do NOT use for player movement speed (see player-avatar AvatarLocomotionSettings) or platform movement (see animations-tweens).

Cross-cutting runtime APIs for Decentraland SDK7 scenes. Use when the user needs async operations (executeTask), HTTP requests (fetch, signedFetch), WebSocket connections, timers, realm/scene detection, restricted actions (movePlayerTo, teleportTo, triggerEmote, openExternalUrl), portable experiences, or the testing framework. Do NOT use for UI (see build-ui), multiplayer sync (see multiplayer-sync), or avatar/player data (see player-avatar).

Capture screenshots of the running Decentraland preview to verify scene changes visually. Covers camera movement, interaction actions, and visual debugging. Use when the preview is running and you need to check what the scene looks like, debug visual issues, or verify layout. Do NOT use for code changes (make changes first, then screenshot).

Build multiplayer Decentraland scenes with a headless authoritative server. Covers isServer() branching, registerMessages() for client-server communication, validateBeforeChange() for server-only state, Storage (world and player persistence), EnvVar (environment variables), and project structure. Use when the user wants authoritative multiplayer, anti-cheat, server-side validation, persistent storage, or server messages. Do NOT use for basic CRDT multiplayer without a server (see multiplayer-sync).