2822b3badf
The spec for .usdz permits only a small handful of file formats to be contained in the archive, and HDR is not among those supported[1]. This also causes validation errors with the `usdchecker` tool (will be properly tested in a follow up change). Ignoring the potential for a user to export a .usdz file with materials referencing unsupported file formats, Blender itself should use only the supported formats for its business. [1] https://openusd.org/release/spec_usdz.html#usdz-specification Pull Request: https://projects.blender.org/blender/blender/pulls/144101
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