Incorrect rendering using quantization compressd gltf model

Incorrect rendering on iOs 14.1, iphone8 Plus

screenshot: gltfTest/gltf-quan.jpg at master · kazusa-fe/gltfTest · GitHub

how about trying update IOS 15.5


cc @bghgary

FYI, I didn’t repro with 15.4 either.

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Yes it works well on most devices but I just can’t force every user to update the system

There isn’t an easy to downgrade to an older version. Apple really doesn’t want people to do that. It will be very hard to repro, let alone fix the problem.