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

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references/vulkan-compositing/README.md

Vulkan Compositing Over OVRTX

When To Use

Use for non-XR native Vulkan presentation of OVRTX output with raster gizmos, orientation triads, billboards, annotations, or custom image overlays. This also covers a viewer that calls its presentation wrapper a VulkanSurface: identify its real color image, layout, owner and completion contract rather than assuming that wrapper exposes OVRTX's internal render targets.

OVRTX continues to render the USD scene. Vulkan presents its pixels and draws the requested overlays. Keep the application's existing shell and render owner; adding a compositor does not require replacing either. For stereo/XR, use the XR references for per-eye camera, image ownership and frame timing first.

Read Order And Boundaries

Resolve packages through dependencies, then read the selected OVRTX release's current agent guidance, output/mapping documentation and Vulkan interoperability contract. Dependency acquisition stays there; this family owns the viewer's composition boundary.
Use interop and lifecycle for CUDA/Vulkan device identity, image ownership, frame slots, barriers, and resource reuse.
Add depth-aware overlays only when overlays must be hidden by scene geometry. It includes the input formats, camera ABI, shader snippets and Vulkan depth state for manual rejection and depth seeding.
For interactive handles, also read input routing, transform manipulators, and transform safety. The compositor consumes accepted camera/tool state; it does not own scene mutations.

For headless ovui widget export followed by CUDA alpha blending, use viewport overlays. For OpenGL overlays, use GL viewport overlays. For image/geometry processing inside OVRTX's GPU graph, use SPG processing. The choices have different resource owners; do not combine their interop APIs.

Choose An Overlay Policy

Need	Composition policy
Corner orientation triad, HUD, screen labels	Draw after the OVRTX color splat with scene-depth testing and scene-depth writes disabled. Use a separate small depth attachment if the triad's own geometry needs self-occlusion.
World-anchored gizmo, billboard or annotation	Use matching scene-distance output; choose manual fragment rejection or seed an app-owned depth attachment.
Several raster passes sharing scene occlusion	Seed D32 once, preserve it, then use compatible depth tests for each pass.
Hidden-handle/X-ray treatment	Make visible/hidden fragment policy explicit; use separate styles/passes without overwriting scene color or depth unintentionally.
Ordinary selected-object feedback	Use native selection feedback; custom raster overlays do not replace picking or native selection groups.
Cutout billboard	Sample texture alpha and discard below a chosen cutoff before depth writes.
Translucent annotation	Choose sorting and blending deliberately; usually test depth but disable depth writes. Alpha zero does not suppress a depth write.

Represent wide handles with triangle geometry such as cylinders, cones and quads. Vulkan wide-line support depends on device features and limits. Derive camera-facing billboard axes from the same displayed-frame camera used for the scene; do not use newer UI camera state with older displayed pixels.

Color Composition

Preserve the OVRTX image when beginning an overlay scope: color attachment loadOp=LOAD, storeOp=STORE. Clear only resources whose prior contents are unneeded. Allocate a separate target when the base image remains owned by a producer or consumer; a mapped OVRTX output is not an app-owned render target.

Choose one alpha convention and match it to the pipeline. With ADD blending:

Source color convention	RGB source factor	RGB destination factor	Alpha factors
Straight alpha	`SRC_ALPHA`	`ONE_MINUS_SRC_ALPHA`	`ONE`, `ONE_MINUS_SRC_ALPHA`
Premultiplied alpha	`ONE`	`ONE_MINUS_SRC_ALPHA`	`ONE`, `ONE_MINUS_SRC_ALPHA`

Inspect actual exported pixels rather than inferring alpha convention from RGBA8. Multiplying premultiplied RGB by alpha again darkens edges. Use a transparent black clear for a separate overlay image. Clear/opaque pixels must be tested, not reconstructed by treating black as transparent.

Keep shader math in linear color where appropriate. An sRGB sampled-image view decodes RGB; an sRGB color attachment performs its defined blend/output conversion. Check how the existing OVRTX splat handles display-encoded color before adding any gamma conversion: double conversion changes the scene even when no overlay is visible. Alpha is not gamma encoded. For HDR, define whether overlays compose before tone mapping or in the display path; do not blend unconverted HDR scene values with display-byte overlay values.

The Vulkan framebuffer contract owns blending and sRGB behavior. The viewer owns the choice of image formats, alpha convention, and the exact order of its color and overlay passes.

Implementation And Evidence

Build app-local allocation/import, frame-slot, pipeline and draw components from the contracts above. No compositor class, shader file or private sample checkout is a prerequisite; generate the required modules in the host application's normal layout. Keep scene state below the UI/compositor boundary, and keep slow asset work off its input path.

Start with color plus an opaque corner marker, then alpha edges, then scene occlusion if requested. Validate both the pre-presentation composite and actual window/transport output. Use validation for artifacts and interop and lifecycle for stale-frame, resize and shutdown acceptance checks.

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

A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.

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.

Download ZIP

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/vulkan-compositing/README.md

Vulkan Compositing Over OVRTX

When To Use

Read Order And Boundaries

Choose An Overlay Policy

Color Composition

Implementation And Evidence

Requirements and compatibility

Security

Attribution and licence

Related skills

Setup TS Deep Modules

To Spec

Improve Codebase Architecture

Domain Modeling

Codebase Design

Prototype

Download ZIP