Create 3D Model Requirements
Create and export 3D model with textures and animation as FBX from Maya. Do note the development scale has to be in meters, save all texture in png or jpg as tga is not recognised during conversion.
Conversion Tool Preparation
The tool (USDPython) for conversion have to be downloaded from apple developer portal(developer account required):
https://developer.apple.com/download/more/?=USDPython
Once downloaded, install the files and it can be found in application folder
Double click on the USD.command and it may tell you if anything is not being installed yet.
Setup environment variable
sudo nano ~/.zshrc
Here insert the following:
export PATH="/Users/dreamaker/usdpython/USD:$PATH"
export PATH="/Users/dreamaker/usdpython/usdzconvert:$PATH"
export PYTHONPATH="/Users/dreamaker/usdpython/USD/lib/python:$PYTHONPATH"
export PYTHONPATH="/Applications/Autodesk/FBXPythonSDK/2020.0.1/lib/Python27_ub:$PYTHONPATH"
to setup FBX, first install the Autodesk FBX SDK
https://www.autodesk.com/developer-network/platform-technologies/fbx-sdk-2019-5
Find the path of the installed FBX.so file location.
Ensure the python install on system version is consistent with FBX SDK version. in this case, python27 should be used.
Add the path to the the USD.command with
sudo nano /Applications/usdpython/USD.command
to insert the path for FBX conversion.
Conversion
Now rerun the USD.command
Now we can use the following command to convert glb, gltf or FBX into USDZ format
usdzconvert YOUR.fbx
