Reality Converter warning needs explanation

I am using Reality Converter (RC) to convert a Blender-created .usdc file, to a .usdz file. On import, I get a warning saying "Invalid scene orientation in USD file"... "must be Y up."

Please explain or provide link to error code explanations.

The Blender default is that Z is up, X is left/right, and +Y is away and Y- is closer, all in reference to the default location of the camera. Is RC expecting something else? Do I need to change the Blender defaults?

What happens if I don't heed the warning? The model looks right in RC and does export. Its behavior in the AR context is problematic and I wish to understand what may be causing it. Serge

Hi, Reality Composer/Converter and RealityKit have Y up and Z forward/backward, so that is where the warning comes from. I would suggest changing the blender defaults and see if that resolves you issue. Also feel free to file a feature request on Feedback Assistant to support exporting models from Reality Converter with different up axes.

Reality Converter warning needs explanation
 
 
Q