USDZLoader: Switch to MeshPhysicalMaterial and add initial clearcoat/clearcoatRoughness/ior support #26713
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Description
Switches USDZLoader to MeshPhysicalMaterial and adds loading support for clearcoat/clearcoatRoughness.
These parameters are already exported by USDZExporter.
Some details seem to be wrong, but I currently suspect GLTFLoader not loading the clearcoat test file correctly in the first place (will report a separate issue).
USDZ loaded into Mac QuickLook
![image](https://cdn.statically.io/img/private-user-images.githubusercontent.com/2693840/266161429-7345d005-6cd5-4921-b975-0dd87d385c69.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.UbXYJOsF85lioKdrKZR4pUUHNcKpaH2S2icXH38c3n0)
USDZ loaded into three.js
![image](https://cdn.statically.io/img/private-user-images.githubusercontent.com/2693840/266161581-3c2e1753-f724-4652-9463-757f3d31f5dd.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.bkt-B7nW2hlqorxlXa3tX6nrmxXG-PPa4yhUjpgWf34)
Test file: ClearCoatTest.zip
This contribution is funded by Needle