Build VR Apps that scale

• 🌐

  Networking Layer Available

  Proven into the thousands of concurrent users, with heavy Burst + multithreaded optimization throughout.

• 📡

  World/Prop/Avatar Protocols Available

  Purpose-built replication & interaction protocols across worlds, props, and avatars.

• 🧑‍🚀

  Synced Avatars Available

  Low-latency avatar replication with eye, hand, and animation drivers, full-body IK replication, and an extensible protocol for additional tracked data (e.g., blendshapes, custom interactions, and expressions).

• 🧱

  Object Sync In Progress

  Ownership replication & transform sync for props, physics pickups, and seats, with more object types landing over time.

• 🤝

  Peer-to-Peer + NAT Traversal Available

  Direct peer links for low-latency data and voice, with automatic NAT hole-punching (including port-prediction spray for hard/symmetric NATs).

• 🔐

  Encrypted Transport Available

  ChaCha20-Poly1305 encryption on peer-to-peer / direct-connect links keeps that traffic private.

• 🗜️

  Network Compression Available

  LZ4 and Deflate compression across avatar bundles and data channels trims bandwidth at scale.

• 🖥️

  Flexible Hosting Available

  Host directly from the client for quick sessions, or run your own dedicated server. The dedicated server is a cross-platform .NET app with a first-boot setup wizard.

• 🛡️

  Server Admin & Moderation Available

  UUID-based admin/permission groups, kick & temp-block controls, and server-driven shout broadcasts.

• 🐞

  Crash & Error Reporting Available

  Opt-in client error reports relay to the server (compressed) for diagnostics — off until a server enables it.

• 🔌

  Swappable Network Backends Available

  The transport layer is pluggable: the default is reliable-UDP (LiteNetLib), and alternate backends can be registered without touching game code.

• 🎙️

  Opus Voice Chat Available

  Real-time voice over Opus (48 kHz) with forward error correction; a jitter buffer and packet-loss concealment keep speech smooth on lossy links.

• 🔇

  Noise Suppression Available

  A neural RNNoise gate strips background noise from your mic before it ever leaves your machine.

• 🎚️

  Mic Processing Suite Available

  Automatic gain control, noise gate, voice-activity detection, and an input limiter — each tunable in settings, with device selection.

• 🧭

  Spatialized 3D Voice Available

  Each speaker's voice plays from their mouth with distance attenuation and falloff for natural proximity chat.

• 🗣️

  Talk Modes Available

  Normal proximity chat plus targeted, private-group, P2P-direct, and admin shout (non-spatial broadcast) modes.

• 🔊

  Per-Player Volume & Mute Available

  Adjust or mute any player individually; a personal block list silences someone entirely.

• 🎵

  AudioLink Available

  Audio-reactive data for shaders (AudioLink) that survives Desktop/VR mode switches, for reactive worlds and avatars.

• 🌐

  Steam Audio Add-on

  Steam Audio is bundled for advanced HRTF, occlusion, and reflection spatialization when a world or avatar opts in.

• 🧩

  Custom Avatars Available

  Bring your own avatars with a streamlined build, upload hooks, and a flexible avatar SDK.

• 🦵

  Full-Body IK (Burst) Available

  Custom full-body IK compiled with Burst for VR-grade performance.

• 🗣️

  Neural Lip Sync Available

  OpenLipSync runs an ONNX neural network to drive 15 MPEG-4 visemes straight from voice, with pooled inference that scales to large lobbies.

• 😉

  Auto Blink & Facial Sim Available

  Automatic blinking and facial simulation for lifelike faces, with overrides when real face-tracking is present.

• 👀

  Eye Driver & Social Gaze Available

  Procedural eye motion with saccades, smooth pursuit, and physiology-based social gaze toward others — with overrides for real eye-tracking input.

• 🤲

  Hand/Finger Driver Available

  Per-finger poses and gestures for natural presence.

• 🪗

  Jiggle Physics (Interactive) Available

  Jobs-based squash-and-stretch jiggle physics with interaction support.

• 🎛️

  Animation Driver Available

  Centralized animation driver for consistent blends and state.

• 🦶

  Foot Placement IK Available

  Procedural foot planting on uneven ground for natural stance and stride.

• 📐

  Height & Scale Calibration Available

  Automatic avatar height and scale calibration to match your real-world proportions.

• 🎯

  Full-Body Tracker Calibration Available

  Guided multi-stage calibration for SteamVR trackers and constellation setups, including tracker pairing.

• 😶

  Blendshape Sync Available

  Networked blendshapes so custom expressions and morphs replicate to everyone, with packed encoding for bandwidth.

• 🎥

  Motion Recording Available

  Record full-body motion (pose, muscles, scale) to file for playback and analysis.

• 😀

  Face & Eye Tracking Comms Available

  HVR Comms relays eye and face-tracking data (ARKit / Unified Expressions) to remote players over the avatar protocol.

• 📷

  Webcam Face & Body Tracking Available

  MediaPipe-driven webcam tracking feeds head/face, hand/finger pose, gaze, and ARKit-style blendshapes as synthetic trackers (requires the MediaPipe plugin). Arm tracking is still in progress.

• 🗿

  Avatar Pedestals Available

  Interactive pedestals for showcasing and selecting avatars, with spawn/preview support.

• 🚶

  Locomotion Modes In Progress

  Walk, fly, and no-clip movement with smooth transitions, plus crouch/stance blending.

• 🏃

  Fast Character Controller Available

  Responsive movement tuned for social VR and dense sessions.

• ✋

  Physics Pickups & Grabbing Available

  Grab, throw, and manipulate props with physics joints, parent constraints, and highlight feedback.

• 🪑

  Seating & Sitting Available

  Sit on interactive seats with networked, synchronized pose.

• 🎚️

  Snap Controls Add-on

  Rotary knobs, levers, and switches that snap to detents and fire per-position events — grab, laser, or desktop input.

• 🚗

  Vehicles Available

  A general-purpose, physics-based vehicle system with seats, wheels/thrusters, engine audio, and networked replication.

• 📸

  Hand-Held Camera Available

  A grabbable in-world camera with photo capture, depth-of-field, 360° stereo capture, and picture-in-picture network streaming.

• 🎱

  Pool Table (Ported) Add-on

  A full multiplayer billiards table — great for social hubs and demos.

• 🏷️

  Nameplates Available

  3D nameplates with speaking indicator, chat bubbles, and typing status above each avatar — baked and amortized for big lobbies.

• 💬

  Text Chat Available

  Networked text chat with typing indicators and history.

• ⌨️

  Virtual Keyboard Available

  An in-world keyboard for VR text entry with customizable layouts; desktop and mobile hardware keyboards are supported too.

• 👥

  Player List Available

  See everyone in the instance and act on them — mute, set volume, or block.

• 🔕

  Mute, Block & Moderation Available

  Per-player mute/volume, a personal block list, and moderator temp-block controls.

• 🔔

  Notifications Available

  An in-app notification center for joins, leaves, and system events.

• ⚙️

  Easy Settings System Available

  Player-friendly settings with sensible defaults that apply live as you change them.

• 🌍

  Localization & Font Fallback Available

  Built-in UI localization with automatic CJK font fallback for Japanese, Chinese, and Korean text.

• 🔗

  Deep Link / URL Prompts Available

  Safe in-world prompts before opening external URLs and deep links.

• 🔧

  Programmatic UI Available

  Build and drive in-world UI from code for fully custom interfaces.

• 🪟

  Panel UI System In Progress

  Spawn panels and manage in-world UI workflows.

• 🧰

  SDK for Avatars, Worlds & Props Available

  Extend BasisVR with samples, components, and hooks.

• 🪞

  Mirrors Available

  Configurable mirrors for setup, debugging, and social spaces.

• 🧭

  World-Space Gizmos Available

  Direct transform gizmos and debug primitives in world space for fast iteration.

• 📦

  Bundle Management Available

  Organize, package, and load/unload content bundles.

• 🎬

  Live Video Player Available

  Hardware-decoded live video (RTSP/RTMP/MPEG-TS/fMP4) straight into a zero-copy GPU texture via OS codecs — no transcode server. Windows, Android, and Linux backends today.

• 🧪

  Sandboxed Scripting (CILBox) Available

  A CIL (C#) interpreter sandbox runs untrusted world/avatar/prop scripts behind a whitelisted API, so community content can ship logic safely.

• 🖥️

  Custom Console Display Available

  In-app diagnostics & developer tooling.

• 🎆

  Audio-Reactive Worlds Available

  AudioLink integration lets world and avatar shaders react to music and voice.

• 🔥

  Runtime Hot-Switching Available

  Instantly hot-switch between Desktop and VR without restarting.

• 🕹️

  SteamVR / OpenVR Available

  PCVR devices and runtimes supported.

• 🧩

  OpenXR Available

  The modern XR standard for broad device compatibility.

• 🤖

  Android / Standalone Available

  A standalone build pipeline for mobile/standalone headsets such as Quest.

• 🐧

  Windows & Linux Desktop Available

  Desktop clients build for both Windows and Linux.

• 🧰

  Device Management System Available

  OS-style device management: enumerate hardware, enable/disable, and apply per-device control mappings.

• 🎯

  Full-Body Trackers Available

  SteamVR tracker support with visual tracker models and a fallback display when pucks aren't present.

• 👁️

  Face & Eye Tracking (3rd-Party) Add-on

  Hardware face/eye-tracking integrations supported by the avatar driver stack.

• 🎨

  Built-in URP Available

  Ships with Unity’s Universal Render Pipeline tuned for VR.

• 🔀

  Swappable Render Pipeline Available

  Some work involved, but it should all come together once APIs are converted over to HDRP or the Built-in RP.

• 🌫️

  Volumetric Fog Available

  URP volumetric fog with per-light scattering, shadows, and cookies; render-graph ready on Unity 6.

• 🎛️

  Shader Prewarm & Fallback Available

  Optional shader prewarming reduces in-world hitches; fallback correction keeps materials valid across render-API swaps.

• 🧪

  Bleeding-Edge Ready Available

  Designed to track the latest Unity releases while mostly supporting older versions (focused on Unity 6.4).

• 🧠

  Efficiency-First Systems Available

  We prioritize extremely efficient systems everywhere — profiling-driven, Burst-enabled, and concurrency-aware.

• 🥽

  VR-Optimized URP Renderer Available

  We've optimized the renderer for VR.

• 📚

  Version Compatibility Guides Planned

  Clear docs on supported versions, upgrade paths, and caveats.

• ⚡

  Engine Optimizations Available

  Hot paths rewritten with Burst and parallel patterns for high player counts.

• 🛡️

  Avatar Performance Limits Available

  Client-side hard-block (pre-load) and soft-trim (post-load) caps on polys, bones, materials, lights, particles, colliders, and jiggle rigs.

• 📉

  Distance-Based Reductions Available

  Automatic quality and update-rate reductions for distant avatars and objects.

• 🗜️

  Avatar State Compression Available

  Quantized transforms and packed blendshapes shrink per-avatar bandwidth at scale.

• 📈

  In-App Profiler Available

  Built-in profiler modules (network, event driver, direct connections) for live performance insight.

• 🧪

  Weekly Tests Available

  Weekly tests verify new features and validate performance to catch regressions before they hit LTS.

• 🚀

  Upload & Build Process Available

  Straightforward content builds for creators.

• 📊

  Build Size & Asset Stats Available

  Inspect built file sizes with per-asset breakdowns to spot heavy files and trim your bundle.

• ✅

  Content Validators Available

  Pre-build validation for avatars, scenes, and props catches errors before you upload.

• 🗂️

  Addressable Dependency Tools Available

  Editor tools to organize asset groups and report dependencies for smaller, isolated bundles.

• 🧱

  NDMF Avatar Pipeline Available

  A non-destructive avatar build hook (NDMF) with automatic viseme/eye mapping for low-friction interop — active when NDMF is installed.

• 🔒

  Password-Protected Bundles Available

  Gate access to builds with bundle-level passwords (cache is keyed per password) to protect pre-release content.

• 🐝

  BEE File Support (.bee) Available

  Basis Encrypted Extension with support for range requests.

Basis stands on the shoulders of excellent open-source work. These are the third-party packages we bundle and build on — each under a permissive license (MIT, Apache-2.0, or BSD). Unity's own packages (URP, OpenXR) are used too, and the in-app Third-Party Licenses panel carries the full texts.

• 🎙️

  OpusSharp BSD / MIT

  Opus voice codec bindings behind real-time voice chat. by AvionBlock

• 🔇

  RNNoise.Net MIT

  Neural microphone noise suppression. Yellow-Dog-Man · xiph

• 🔊

  Steam Audio Apache-2.0

  HRTF spatial audio with occlusion and reflections. by Valve

• 🎵

  AudioLink MIT

  Audio-reactive data for shaders and effects. by llealloo

• 🕹️

  SteamVR BSD-3-Clause

  SteamVR runtime & input (trimmed for Basis). by Valve

• 🥽

  OpenVR XR Plugin BSD-3-Clause

  Rendering support for OpenVR devices in Unity XR. by Valve

• 🪗

  Jiggle Physics MIT

  Jobs-based squash-and-stretch secondary motion. by naelstrof

• 😀

  HVR Basis Comms MIT

  Face/eye-tracking comms & blendshape actuation. by Haï~

• 🧱

  HVR Basis NDMF Hook MIT

  Non-destructive avatar build pipeline hook. by Haï~

• 📷

  MediaPipe Unity Plugin MIT

  Backs optional webcam face/body tracking. by homuler

• 🌫️

  URP Volumetric Fog MIT

  Volumetric fog integrated into URP's volume system. by Cristian Qiu Félez

• 🧪

  Cilbox MIT

  Sandboxed C# CIL interpreter for untrusted scripts. by cnlohr

• 📡

  LiteNetLib MIT

  Lite reliable UDP — the default network backend. by RevenantX

• 🌐

  MeaMod.DNS MIT

  DNS / mDNS library for discovery. by MeaMod

• 🧾

  Newtonsoft.Json MIT

  High-performance JSON serialization. by James Newton-King

• 🗜️

  K4os.Compression.LZ4 MIT

  LZ4 compression for bundles and data. by Milosz Krajewski

• 🔢

  Base128 MIT

  Variable-length integer (varint) serialization. by Wojmik

• 🔡

  SimpleBase MIT

  Base16/32/58/85 encoding & decoding. by Sedat Kapanoğlu

• 🟰

  Generator.Equals MIT

  Source-generated equality from attributes. by Diego Frata

• 🔐

  BouncyCastle MIT

  Cryptography primitives library. by Legion of the Bouncy Castle