I was able to reduce the file size of infinigen usd files to around 30mb. I used a decimate python blender script which I can share if needed.
I tried converting usd to glb using a python library but got an error about a missing texture. I tried flattening it with usdcat first but that didn’t work.
I tried opening the usdc file in xcode, but it took too long. I was able to open the reduced file size usd in usdviewer. However couldn’t figure out how to move and it was very slow.
Unity and Unreal support USD so I am going to give them a try. I have wanted to try them for awhile.
https://chatgpt.com/share/670aac12-2f28-8012-a029-455f58e1524d