Luxar Viewer API Documentation - v2026.9.22
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    PHYSICAL_MESH_KNOB_KEYS: readonly (
        | "roughness"
        | "metalness"
        | "clearcoat"
        | "clearcoat_roughness"
        | "iridescence"
        | "sheen"
        | "transmission"
        | "ior"
        | "thickness"
        | "attenuation_distance"
        | "dispersion"
    )[] = ...

    The knob keys in panel order (object key order is insertion order).