On the version of your package I have access to, this is not what I observe.
The material with a draw order of 100 is named Raf_Windshield_DO100 and has the ASOBO_material_windshield_v3 extension.
It’s rather tricky for us to track the issue without having a look at the unoptimized gltf.
You definitely have an order issue though. On the Jaguar, we can clearly see the windshield is drawn last:
Edit: the icing/rain is a post effect applied after all transparent material have been rendered, so possibly not related to draw order setup.
I don’t have an explanation yet as to why your config would lead to a different result than the F/A-18, we’ll investigate further.
Could you please send us a gltf from the Jaguar cockpit as outputted by Max/Blender, (so prior to package build, not the one outputted in the Packages folder).
