I am trying to follow the WWDC 2022 video Explore USD tools and rendering: https://developer.apple.com/videos/play/wwdc2022/10141/ I followed the steps here to create an Xcode project that uses OpenUSD to load scenes. https://developer.apple.com/documentation/metal/metal_sample_code_library/creating_a_3d_application_with_hydra_rendering?language=objc After installing OpenUSD and generating an Xcode project, I opened Xcode, set the scheme to hydraplayer and clicked the build button. The code compiles but fails to link with a bunch of undefined symbols errors like this one: Undefined symbol: pxrInternal_v0_23__pxrReserved__::GfMatrix4d::SetDiagonal(double) I tried to tag this post wwdc2022-10141, but the tag was not found so I tagged a related session.

Is there support for using multiple UV channels in AR QuickLook in iOS17? One important use case would be to put a tiling texture in an overlapping tiling UV set while mapping Ambient Occlusion to a separate unwrapped non-overlapping UV set. This is very important to author 3D content combining high-resolution surface detail and high-quality Ambient Occlusion data while keeping file size to a minimum.