This patch allows the user to choose the Stage Up Axis at export time,
allowing the export to match another target software package. The most
common is reorienting to Y up. The up axis is written to stage metadata
and a top-level orientation is applied to reorient objects in the Stage.
The new orientation is required because the Stage metadata `upAxis` is,
apparently, not used during certain USD composition arcs. The
recomendation is to only use a single `upAxis` throughout the pipeline
and this option here allows files produced by Blender to more easily
conform to the conventions used as needed.
Co-authored-by: Charles Wardlaw <cwardlaw@nvidia.com>
Pull Request: https://projects.blender.org/blender/blender/pulls/121226
2415380061