[5.6 bug] FbxImportUI settings physics_asset configuration appears to have no effect

Development Pipeline & Plugins Editor Scripting
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1

My fbx import script that used to work in 5.4 stopped creating physics asset when ran in 5.6

i checked the api and doesnt seem like it has changed between the two versions.

below is the fbx import script:

import unreal

# File and destination

fbx_file_path = source_file

destination_path = import_folder

fbx_import_options = unreal.FbxImportUI()

fbx_import_options.automated_import_should_detect_type = False

fbx_import_options.import_as_skeletal = True

fbx_import_options.mesh_type_to_import = unreal.FBXImportType.FBXIT_SKELETAL_MESH

fbx_import_options.skeleton = None

fbx_import_options.physics_asset = None

fbx_import_options.create_physics_asset = True

fbx_import_options.set_editor_property(‘import_mesh’, True)

fbx_import_options.set_editor_property(‘import_textures’, False)

fbx_import_options.set_editor_property(‘import_materials’, True)

fbx_import_options.set_editor_property(‘import_animations’, False)

fbx_import_options.set_editor_property(‘reset_to_fbx_on_material_conflict’, False)

fbx_import_options.set_editor_property(‘physics_asset’, None)

fbx_import_options.set_editor_property(‘create_physics_asset’, True)

# Import setting

task = unreal.AssetImportTask()

task.destination_path = destination_path

task.filename = fbx_file_path

task.automated = True

task.replace_existing = True

task.replace_existing_settings = True

task.options = fbx_import_options

task.save = True

asset_tools = unreal.AssetToolsHelpers.get_asset_tools()

asset_tools.import_asset_tasks([task])

2

Steps to Reproduce
I have no way to auto generate the PhysicsAsset asset when importing fbx via python script. This used to work in 5.4 but the exact same python code doesnt work in version 5.6

these two line have no effect in UE5.6:

unreal.FbxImportUI.create_physics_asset = True

unreal.FbxImportUI.physics_asset = None

3

Hi Lillia,

Sorry for the inconvenience.

Does this issue happen on all FBX files or only on some? If the latter, could you share one example of file failing?

Thanks.

Regards,

Jean-Luc

4

Hi Lillia,

Add the following line at the beginning of your script:

unreal_editor_subsystem = unreal.get_editor_subsystem(unreal.UnrealEditorSubsystem)
unreal.SystemLibrary.execute_console_command(unreal_editor_subsystem.get_editor_world(), "Interchange.FeatureFlags.Import.FBX false")

This will disable Interchange FBX and legacy FBX will be invoked.

Let me know how it goes

Regards,

Jean-Luc

5

Hi Lillia,

Yes, we will look into it in a future release.

Regards,

Jean-Luc

6

it happens on all FBX files

7

Turning off interchange fixed the issue, thanks!

was wondering if this is possible to be fixed in the future versions with interchange FBX on?