Prerequisites
- NVIDIA Isaac Sim installed and licensed. See the Isaac Sim documentation for installation instructions.
- A Gizmo account with alpha access. Contact viswajit@antimlabs.com if you don’t have one yet.
- At least one asset generated in Gizmo (see Generate Your First 3D Asset).
Steps
Generate or select an asset in Gizmo
Sign in at gizmo.antimlabs.com and either generate a new asset or open an existing scene containing the asset you want to export.If you haven’t generated an asset yet, follow the Generate Assets guide first.
Choose an Isaac Sim export format
In the asset or scene panel, click Export. You will be presented with format options:
- USD (Recommended)
- URDF
Universal Scene Description (USD) is NVIDIA’s preferred format for Isaac Sim. It preserves:
- Full scene hierarchy and transforms
- Materials and PBR textures
- Articulation graphs (joints, drives, limits)
- Physics schema annotations (rigid bodies, colliders, mass properties)
Download the exported file
After selecting your format, click Download. Gizmo will package the asset (including any associated texture maps and mesh files) into a single archive.Save the file to a location accessible from your Isaac Sim workstation.
Import into Isaac Sim
- Importing USD
- Importing URDF
- Open Isaac Sim and create a new or existing stage.
- In the Content browser, navigate to the folder containing your downloaded
.usdfile. - Drag the file onto the viewport, or right-click it and select Add to Stage.
- Isaac Sim will load the asset with its full hierarchy, materials, and physics schema intact.
Verify physics properties in Isaac Sim
After import, confirm that the asset is simulation-ready:
- Select the asset’s root prim in the Stage panel.
- Open the Physics Inspector (Window → Physics → Physics Inspector) and review:
- Rigid body components on links
- Collider shapes (box, capsule, convex mesh, etc.)
- Articulation root and joint definitions
- Mass and inertia values
- Press Play (▶) to run a quick simulation and confirm the asset behaves as expected.
Supported export formats
USD
Universal Scene Description is the native format for NVIDIA Omniverse and Isaac Sim. It supports layered composition, rich materials (MDL/UsdPreviewSurface), and the full UsdPhysics schema. Ideal for complete scene exports and downstream Omniverse workflows.
URDF
Unified Robot Description Format is an XML standard for robot kinematic and dynamic descriptions. It’s the go-to format for ROS integration and is supported by Isaac Sim’s URDF Importer, which converts it to USD automatically.
Articulation and physics
All assets exported from Gizmo include joints and physics properties pre-configured. You do not need to manually add rigid body components, colliders, or articulation roots — they are embedded in the exported file. This means assets are simulation-ready the moment you import them into Isaac Sim.