Issue: Incomplete GDML optical surface import for painted finishes and multiple surfaces

Issue: Incomplete GDML optical surface import for painted finishes and multiple surfaces: a task in LegoFlow-SWE (Harbor dataset). The Geant4‑to‑Celeritas GDML importer fails to correctly import optical surface configurations that use the UNIFIED model with “painted” finishes. As a result, some…

The task

The Geant4‑to‑Celeritas GDML importer fails to correctly import optical surface configurations that use the UNIFIED model with “painted” finishes. As a result, some surfaces are missing entirely, their interaction type is misclassified, or the required optical surface material is not attached.

Part of Lego-X/LegoFlow-SWE.