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Hello everyone I'm trying to unzip a USDZ file, modify a texture, and then zip the USDZ file again, but it breaks.

Is there any special way to zip the file back? Even if I decompress and compress again it stops working and has different file size.

I'm using no compression and no encryption to zip the file. One thing I have noticed is that the attribute "Needed to extract" for the USDZ file is "2.0 or later" while my new zip file value is "1.0 or later". Also the files in the original USDZ zip have some extra fields I cannot read or add to my new file.

What could be happening? Any help would be appreciated.

Andy Jazz
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Arturo Marruffo Vegas
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2 Answers2

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Unzip usdz file

To unzip a usdz file in macOS use the following steps (if you don't have Mac, use a Hackintosh):

  • In Finder change the extension of .usdz file to .zip.
  • Uncompress .zip file by double-clicking it.
  • Open unzipped directory and change the .png textures of your model.
  • Open and edit .aiff, .caf or mp3 audio files, if any.
  • You can import a binary .usdc file in Maya 2024 for animation.

enter image description here


Create usdz file again

Make sure that the latest versions of Xcode and USDZ Python Tools are installed.

To convert a content of unzipped folder (binary usdc file and its textures) back to usdz file format again, use the following command in Terminal.app:

usdzconvert ~/Desktop/file.usdc -diffuseColor Grammophone_Albedo.png 
                                -metallic Grammophone_Metallic.png
                                -occlusion Grammophone_AO.png
                                -normal Grammophone_Normal.png
                                -roughness Grammophone_Roughness.png

And here's an additional info about usdzconvert command for Xcode 14/13/12/11/10.

Andy Jazz
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To pack my modified USDZ file back, I used the tools provided here: https://github.com/PixarAnimationStudios/USD (usdzip) which works in Windows and Linux.

Arturo Marruffo Vegas
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