USDConverter

A USDZ-to-OBJ converter powered by Model I/O

Usage

1. Use Xcode to compile the project.
2. Move the resulting usdconv binary somewhere into your PATH or into the same directory as the USDZ files you want to convert.
3. Execute it from the terminal like this:

usdconv model1.usdz

You can also convert multiple files in one go by simply specifying more files:

usdconv model1.usdz model2.usdz model3.usdz

Each input file will yield five output files:

• model.obj
• model.mtl
• model_ModelIO.obj
• model_ModelIO.mtl
• model_duplicates.txt

model.obj and model.mtl are the files you want.

The *_ModelIO files are just there for reference and can safely be discarded. They are the unchanged output of Apple's Model I/O API, but might not be useful, as they might contain dozens of duplicate materials that USDConverter usually filters out.

In case you want to use the *_ModelIO files anyway, model.duplicates.txt is a list of duplicate materials, sorted by amount of occurrences.

Using Blender?

Check out my alternate OBJ importer with support for the additional PBR MTL directives: io_scene_obj_modelio