Format-agnostic parse options carried through the registry. A loader that has no use for a field
ignores it; the bag stays generic so registering a new kind never widens the public seam.
3MF paint_color palette override (hex #RRGGBB per 0-based slot), instead of the file's own
project_settings.config. Ignored by loaders that don't consume it (e.g. STL).
Format-agnostic parse options carried through the registry. A loader that has no use for a field ignores it; the bag stays generic so registering a new
kindnever widens the public seam.