USD Importer doesn't adjust for metersPerUnit metadata

[dgovil]

Describe the bug The USD Importer doesn't adjust imported objects scales to match the metersPerUnit metadata. This is a hard problem to solve, as has been discussed in the USD group before I believe, but I did not see a related PR, so am filing for documentations sake at the very least, and with some hope that it can be fixed in the future.

Steps to reproduce Steps to reproduce the behavior:

1. Import both attached usda files in the zip

Expected behavior The cubes should be the same size, but are not

Attachments The two assets in here should come in at the same scale if the metersPerUnit metadata was respected Archive.zip

Specs (if applicable):

• OS & version: macOS
• Compiler & version : Apple Clang
• Maya version: Maya 2018, 2020, 2020.3
• Maya USD commit SHA 8b3da3c
• Pixar USD commit SHA [e.g. dev at b85ddac] d8a405a1344480f859f025c4f97085143efacb53

Additional context

Using the mayaUSDplugin.bundle