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Gantry

Importing Models

How to Open a File

Section titled “How to Open a File”

There are several ways to import a 3D model into Gantry:

  1. File menu: Choose File → Open (⌘O) and select your model
  2. Toolbar: Click the Import button in the toolbar
  3. Drag and drop: Drag a file from Finder into the Gantry window
  4. Dock: Drag a file onto the Gantry icon in the Dock to open it, even if Gantry isn’t running

To work with multiple models at the same time, use File → New Window (⌘N) to open additional windows.

Supported Import Formats

Section titled “Supported Import Formats”

Universal Scene Description

Section titled “Universal Scene Description”
  • .usd — USD (auto-detects ASCII or binary encoding)
  • .usda — USD ASCII (human-readable text)
  • .usdc — USD Crate (compact binary)
  • .usdz — USDZ archive (self-contained, used for AR and Apple platforms)

3D Interchange Formats

Section titled “3D Interchange Formats”
  • .fbx — Filmbox, widely used for character and animation exchange
  • .gltf / .glb — glTF, the Khronos Group open standard for runtime 3D
  • .obj — Wavefront OBJ, a simple mesh format with optional .mtl materials
  • .abc — Alembic, used for baked geometry and point caches

Specialized Formats

Section titled “Specialized Formats”
  • .ply — Polygon File Format, common for scanned point clouds and meshes
  • .stl — Stereolithography, commonly used in 3D printing workflows
  • .sbsar — Adobe Substance material archive
  • .spz — Gaussian Splat scene format

After Importing

Section titled “After Importing”

Once a model is loaded you’ll see:

  • The model name in the window title
  • A live 3D preview in the RealityKit viewport
  • Material editing controls in the inspector panel
  • Stage metadata (up-axis, scale, default prim) in the inspector’s Stage Properties section
  • Animation and blend shape controls if the model contains them