Omniverse Realtime Viewer

NVIDIAOfficialCreated by NVIDIA Omniverse

Skill
Tool integration
Software development
Apache-2.0
Medium risk

From the author

Use as the top-level router for Omniverse Realtime Viewer USD apps, XR delivery, SPG GPU processing, stylized rendering, and focused viewer reference documents.

— the description by NVIDIA Omniverse

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

The Omniverse Realtime Viewer skill acts as a central routing and architectural framework for developing USD-based 3D viewer applications. It provides a structured approach to composing rendering, scene state, and delivery mechanisms, ensuring that developers can integrate OVRTX rendering, OVStage scene management, and various UI or streaming adapters effectively. The skill emphasizes a modular architecture where the viewer runtime, UI/input adapters, and delivery systems are decoupled, allowing for consistent behavior across local and streamed environments.

What it does

Provides a routing architecture for USD viewer apps, XR delivery, and GPU-accelerated rendering.
Defines the separation of concerns between viewer runtime, UI adapters, and delivery systems.
Offers guidance on integrating OVRTX for high-fidelity 3D rendering.
Establishes conventions for camera interaction, scene state management, and input handling.
Supports the implementation of specialized features like stylized rendering and CAE/CFD visualization.
Provides protocols for agent-to-UI communication and scene control.

When to use it

When starting the development of a new USD-based realtime viewer application.
When integrating advanced rendering features like stylized visualization or AOV switching.
When building XR or spatial editing capabilities into an existing Omniverse application.
When you need to standardize the architecture for local and streamed viewer deployments.
When implementing chat-driven scene control or agent-based inspection of a 3D scene.

Advantages

Promotes a clean, modular architecture that separates rendering logic from UI and transport.
Ensures consistent behavior across different delivery methods, such as local windows or WebRTC streaming.
Provides clear paths for extending functionality without disrupting the core viewer runtime.
Facilitates the integration of complex simulation and visualization data into the viewer.
Standardizes conventions for scene state, selection, and camera control.

Usage examples

“How do I set up a basic USD viewer application using the Omniverse Realtime Viewer architecture?”: The agent will guide you to start with the viewer app reference, resolve dependencies, and implement the core runtime owner to manage the OVStage and OVRTX renderer.
“I need to add stylized rendering to my existing viewer. Where should I start?”: The agent will direct you to the stylized visualization references to implement the required USD/Lua/CUDA nodes within your existing runtime owner.
“How can I enable an AI agent to control the viewer scene?”: The agent will point to the A2UI Scene Copilot reference to implement an operation interface that allows the agent to send commands through the existing runtime owner.
“How do I switch between different render outputs like beauty and depth in my viewer?”: The agent will explain how to use the AOV switching reference to map RenderVars and update the RenderProduct's orderedVars through the runtime owner.

Install

Download the skill as a ZIP:
https://autogineer.com/agent-skills/nvidia/omniverse-realtime-viewer/download

Unzip it into the cross-client skills folder of your project:

mkdir -p .agents/skills && unzip omniverse-realtime-viewer.zip -d .agents/skills

Documentation by NVIDIA Omniverse

Omniverse Realtime Viewer

Build responsive USD viewers by composing OVRTX rendering, OVStage scene state, and the delivery/UI libraries appropriate to the app. Use this package for viewer architecture and interaction; use each selected SDK's upstream guidance for installation and exact release-specific APIs.

Start With The App

When delivery is explicit, select its recipe through references/routing.md and follow its current phase. Otherwise start with references/usd-viewer-app/README.md. For an existing app, keep its architecture and read only the references for the requested change. Broad app, conventions and UI catalogs are lookups as needed.
Resolve the selected libraries through references/dependencies/README.md. Preserve the project's manifest unless an upgrade is requested.
Build a working frame and camera interaction in the chosen shell, then add the requested capabilities. Read references/conventions.md for shared input, camera, selection, and protocol conventions.
Use references/viewer-ux-workflow/README.md for broader interface design. Loading, selection feedback, errors, and input responsiveness belong in the first working app, alongside rendering.
Validate the actual delivery path with references/validation.md. A browser screenshot does not validate a native window or a different transport.

Architecture

Owner	Responsibility
Viewer runtime	Own the live OVStage, publication clock, OVRTX renderer, scene changes, and render stepping.
UI and input adapter	Display frames and copied app state; send user intent to the runtime owner.
Storage/query/simulation workers	Perform their assigned work and return results through the selected integration boundary.
Delivery adapter	Present locally or stream through ovstream; respect frame ownership and backpressure.

Use OVRTX for USD/3D rendering. Browser apps display its WebRTC video; local apps present its output through their native shell. A missing GPU means rendering is unverified, not a reason to substitute a browser 3D renderer.

Keep viewer cameras, settings, effects, and transient edits in app-owned session or runtime state so the source USD stays intact. Serialize scene mutation and render stepping through the runtime owner. Read references/ovstage-ovrtx-integration/README.md for that loop, then the population or data-plane references when implementing scene loading or attribute writes.

Keep expensive loading and metadata work off the UI and render threads. Keep transport details behind a delivery adapter so camera, selection, properties, and loading state can be reused across local and streamed shells.

Add Capabilities As Needed

Use references/routing.md to select camera/picking, scene management, render settings, cloud assets, simulation, editor tools, deployment, or CAE/CFD visualization. Read the selected capability's implementation flow and its linked contract; the full reference catalog is not a prerequisite for a first frame.

For simulation, use the routing reference's Simulation Ecosystem section plus references/realtime-sim-integration/README.md. For UI-driven forces or control, add references/interaction-round-trip/README.md.

For example scenes, use references/usd-sample-data/README.md. When a runtime failure needs diagnosis, use references/troubleshooting/README.md and the selected SDK's matching release guidance before changing the architecture.

Solid Modeling: Upstream First

For usd-brep, exact BRep, solid modeling, kernel failures, CAD topology, or BrepArray questions, first read references/dependencies/README.md → USD BRep. Follow the owning repository's current agent guidance, skills, operation docs, and package API before selecting local integration references. Discover the upstream router rather than assuming skill names or directory layouts remain fixed. Upstream owns modeling semantics, schema rules, tuning, and diagnostics; this package owns OVRTX display, worker handoff, selection mapping, and publication timing.

GPU Processing And Stylized Viewers

For custom GPU processing, chained outputs and lens sampling, read references/spg-processing/README.md. For toon, ink, technical/X-Ray styles, geometry strokes or full wireframe, continue to references/stylized-visualization/implementation.md. Its USD/Lua/CUDA starting node and geometry/depth/composite build sequence work with the selected viewer recipe; use references/stylized-visualization/style-recipes.md for the preset math and references/stylized-visualization/README.md for supporting contracts. Implement the result inside the existing OVRTX/runtime owner and deliver the published processed output. These instructions do not require a sample checkout or a prior stylized-rendering implementation.

For an optional usd-brep geometry source, first read references/dependencies/README.md → USD BRep and the owning repository's current agent guidance, skills, and operation docs; then read references/stylized-visualization/usd-brep-source.md for the display boundary.

XR Viewers

For headsets, immersive viewers, or spatial editors, start with references/xr-viewer-recipe/README.md. Resolve SDK setup and contracts through references/dependencies/ovxr.md; the library owns OpenXR lifecycle and frame submission. For controllers, hands, navigation, or scene tools, add references/xr-spatial-input/README.md and references/ovxr-python-interactions/README.md. For projection-integrated UI, read references/ovxr-composition-ui/README.md and references/ovxr-composition-ui-validation/README.md.

Files

ATTRIBUTION.mdAdded by AutoGineer943 B
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references/ovxr-composition-ui/async-raster-pipeline.md

Bounded retained raster pipeline

This is an application protocol, not an OVXR export. Use it when adding dense panels or fixing interaction-time stalls. Skia/Yoga owns paint and layout; raster ABI owns the native copy/upload boundary.

State and ownership

Owner	State	Allowed work
XR/application owner	Canonical model, selected IDs, desired document revision, displayed image/hit-map pair	Apply commands; offer immutable snapshots; poll ready results without waiting
Raster supervisor worker	Child generation, one in-flight request, one replaceable pending request, one completed result	Bounded serialization, child I/O, deadline/restart handling
Raster child	Fonts, theme, Yoga layout, Skia canvas	Render immutable request; return RGBA and its exact hit regions
Native compositor	Accepted/uploaded image revisions and retained GPU texture	Copy caller bytes, upload changed revisions, retire GPU resources

One in-flight/one pending/one result is a bounded policy, not permission to allocate unbounded snapshots. Bound request bytes, result bytes, dimensions, node count, diagnostic stderr and total surfaces. For multiple windows use a bounded dirty-surface set with fair scheduling so a busy toolbar cannot starve the stage tree. A shared atlas is optional, not required for state ownership.

Each request/result carries:

surfaceId, stageGeneration, surfaceGeneration, workerGeneration,
documentRevision, width, height, theme/font identity
result additionally: format, alphaConvention, pitchBytes, pixels, hitRegions

Pose revision is separate. Never send a new raster merely because the hand, anchor or panel pose moved. Reject old stage/surface/worker generations even if their document number is large. Within a generation, revisions increase.

Owner-side algorithm

on semantic model change:
    build bounded immutable snapshot outside expensive stage extraction
    increment desired document revision
    replace pending snapshot under a short lock; return immediately

each owner update:
    take at most one complete result without waiting
    validate identity, bounds, lengths, finite hit rectangles and revision
    reject stale generation or revision <= currently displayed
    retain newest eligible complete image/hit-map pair
    publish it through the copied native image ABI
    keep pose-only updates independent

A valid completed revision may precede the latest desired revision. Accepting it avoids starvation during continuous hover changes; continue toward the latest pending request. Never regress the displayed revision or combine newer hit rectangles with older pixels. If native upload/presentation lags, either promote hit testing only with its acknowledged displayed revision or disable activation until the pair is coherent. Native copy acceptance alone is not proof the headset has shown those pixels.

Route actions by stable surface/node ID plus document/stage generation, never row number alone. Resolve against current authoritative state before mutation. Deleted or disabled targets reject cleanly; stale visual state cannot authorize a destructive action. For captured press/release, retain that node's identity and cancellation policy across later raster revisions.

Child transport and failure

Use framed binary RGBA plus bounded metadata, not large base64 images in the XR loop. Define magic/version, metadata length, pixel length, width/height and pitch; check overflow and pitch >= width*4, and require the exact declared payload. Read exact byte counts on the worker. Reserve stdout for the protocol; drain stderr into a bounded diagnostic ring so a full pipe cannot deadlock it.

Start a deadline before writing the request. A reply timeout does not bound a blocked stdin write. The supervisor must be able to terminate its own stuck child and close that generation's pipes, then join/reap it within a declared shutdown budget. Reader threads capture their own process/pipe generation; late output must never enter a replacement child's response queue.

Keep the last complete displayed pair on transient failure, label it stale and disable unsafe actions. Retry the newest still-relevant request only within a bounded attempt/time policy. On exhaustion expose unavailable/error while XR continues; do not restart the viewer or spin-retry every frame. On shutdown stop new offers, cancel pending work, and clean up the owned child off the XR frame path. A stage replacement clears obsolete action captures immediately even if old pixels are retained briefly for presentation.

Tests and counters

Test blocked request writes, truncated/oversized results, child death, late old-generation responses, continuous hover bursts and multi-window fairness. Assert bounded memory, nonblocking owner updates, coherent image/hit maps and no pose-only raster uploads. Record requested/completed/displayed revisions, queue replacements, timeouts/retries, raster/IPC/upload time and bytes separately.

Requirements and compatibility

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Needs: Needs Python, Needs Node.js

The author says: Orchestrator skill. Downstream focused references may require NVIDIA GPUs, ovrtx, ovstream, ovui, OpenUSD, Python, Node/React, Tauri, Electron, C++, or cloud GPU deployment access depending on the selected viewer path.

Security

What our scanner noticed· Medium risk

Large base64-encoded blobs
Instructions that use the network

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Attribution and licence

Created by

NVIDIA Omniverse

Publisher

NVIDIA (Official)

Source

NVIDIA/skills · skills/omniverse-realtime-viewer · commit fce3cca

Licence

Apache License 2.0 (redistribution allowed)

LICENSE (added by AutoGineer from LICENSE-APACHE)
ATTRIBUTION.md (written by AutoGineer)

Synced

2026-11-09

AutoGineer is not affiliated with or endorsed by NVIDIA Omniverse or NVIDIA.

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The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download omniverse-realtime-viewer.zip

From the author

AutoGineer summary

What it does

When to use it

Advantages

Usage examples

Install

Documentation by NVIDIA Omniverse

Omniverse Realtime Viewer

Start With The App

Architecture

Add Capabilities As Needed

Solid Modeling: Upstream First

GPU Processing And Stylized Viewers

XR Viewers

Files

references/ovxr-composition-ui/async-raster-pipeline.md

Bounded retained raster pipeline

State and ownership

Owner-side algorithm

Child transport and failure

Tests and counters

Requirements and compatibility

Security

Attribution and licence

Related skills

Setup TS Deep Modules

To Spec

Improve Codebase Architecture

Domain Modeling

Codebase Design

Prototype

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