benilla-formats/src/light/fog_band.rs reads our LightFogBand.dbc (the LightFloatBand record, 13 rows per LightParams: height fog, curve blend, sun-fog rgb/strength/angle, end-fog rgb/distance). Absent file = empty catalog, no error. blend_chain exposes the area-light blend order so a side table folds with the same law as the stock bands. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>