question

I have tested the exporter in July and it appeared to work, it did create a proper file set for an object. However now, after a huge amount of time spent in modeling a terminal in my project, when I tried to export, it throws an error. What's even worse, the file I tested on, back in July, also returns an error. I installed Blender 3.1.2 and tried there - same error. All materials are converted. Please help, I can't work on the project if I can't export the files.

location: <unknown location>:-1
Error: Python: Traceback (most recent call last):
  File "C:\Users\Roman\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\io_scene_gltf2_msfs\io\msfs_multi_export.py", line 171, in execute
    MSFS_OT_MultiExportGLTF2.export(
  File "C:\Users\Roman\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\io_scene_gltf2_msfs\io\msfs_multi_export.py", line 45, in export
    bpy.ops.export_scene.gltf(
  File "D:\Program Files\Blender 3.1\3.1\scripts\modules\bpy\ops.py", line 132, in __call__
    ret = _op_call(self.idname_py(), None, kw)
RuntimeError: Error: Python: Traceback (most recent call last):
  File "D:\Program Files\Blender 3.1\3.1\scripts\addons\io_scene_gltf2\__init__.py", line 651, in execute
    return gltf2_blender_export.save(context, export_settings)
  File "D:\Program Files\Blender 3.1\3.1\scripts\addons\io_scene_gltf2\blender\exp\gltf2_blender_export.py", line 46, in save
    json, buffer = __export(export_settings)
  File "D:\Program Files\Blender 3.1\3.1\scripts\addons\io_scene_gltf2\blender\exp\gltf2_blender_export.py", line 71, in __export
    json = __fix_json(exporter.glTF.to_dict())
  File "D:\Program Files\Blender 3.1\3.1\scripts\addons\io_scene_gltf2\io\com\gltf2_io.py", line 1203, in to_dict
    result["materials"] = from_union([lambda x: from_list(lambda x: to_class(Material, x), x), from_none],
  File "D:\Program Files\Blender 3.1\3.1\scripts\addons\io_scene_gltf2\io\com\gltf2_io.py", line 56, in from_union
    assert False
AssertionError

location: D:\Program Files\Blender 3.1\3.1\scripts\modules\bpy\ops.py:132

location: <unknown location>:-1

Edit:

This has something to do with materials. If I create a test cube with a MSFS Srandard material it works OK and exports without errors - although all images are named image.png, image-1.png and so on, instead of material name or something meaningful. That also means multiple images for same materials on different objects?

But as soon as I change material from "Standard" to "Parallax" (which I use extensively in my sceneries) - I get the same error!

What's worse, if I check the "day/night cycle" checkbox even on "Standard" material - I get the same error immediately!

And checking "Collision Material" results in the same error!

So either "Parallax" or "Day/Nifht cycle" or "Collision Material" do not work, and result in the fatal error.

This is a major disaster! I have spent a lot of time on creating an Asset Library and converting/migrating all my materials (about a hundred of them) to the new format. Now it turns out nothing can't be exported, and basically this Asobo Blender Exporter is unusable, because it can't export parallax, day/night cycle and collision, which I always use. Please tell me there's something with my setup that's wrong and can be fixed, and it's not a dead end...