select_set raises in Blender for an object with no base in the view layer, so a scene
with off-layer objects could fail the export or mask its result. A selection naming an
off-layer object is refused by name; no selection means the selection is never read or
written. Docs state the unchecked texture sidecars and the TOCTOU residue.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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