Just testing out a model with an albedo and an emissive that look very different - exported with emissive strength 0 as a glb, drag/dropped into my Needle model viewer it shows the material fine with the emissive strength as 0 but when exported to Apple Quick Look, the emissive strength does not pass through as 0 so the emissive strength shows as 0.5. Is this a Quick Look exporter bug? I have a repro model I can privately share