loper

Loper · VFX, 3D & motion

Open .usda files on your Mac.

.usda

Universal Scene Description layers in their readable text form.

Loper is a free, minimal editor for macOS that opens USD (ASCII) instantly and colors every part of the file, so you find the value you need at a glance and can fix it right there. No IDE, no project to load, no gray wall of text.

Download Loper – freeAll formats
shot_042.usda opened in Loper: USD (ASCII) with color-coded Python
Show the file as text
#usda 1.0(    defaultPrim = "World"    upAxis = "Y") def Xform "World"{    def Camera "shotCam"    {        float focalLength = 35    }}

How to open .usda files

  1. Download Loper (free, Apple silicon, signed and notarized) and move it to Applications.
  2. Double-click your .usda file, drag it onto the Loper window, or right-click it and choose Open With › Loper.
  3. Want every .usda file to open in Loper? Choose Loper › Make Loper the Default Editor….

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