Added legacy fbx importer validation

src/addons/send2ue/core/validations.py

@@ -336,6 +336,16 @@ def validate_required_unreal_project_settings(self):
                         )
                     )
                     return False
+
+        if self.properties.validate_project_settings:
+            if not UnrealRemoteCalls.is_using_legacy_fbx_importer():
+                utilities.report_error(
+                    "The Legacy FBX Importer must be used instead of Scene Interchange. Please run this command in the "
+                    "Unreal Editor: Interchange.FeatureFlags.Import.FBX False. Otherwise, persist this in the project's "
+                    "DefaultEngine.ini file."
+                )
+                return False
+
         return True
 
     # TODO: temporary validation before lods support for groom is added

src/addons/send2ue/dependencies/unreal.py

@@ -1101,6 +1101,11 @@ def get_project_settings_value(config_name, section_name, setting_name):
         parser.read(config_path)
 
         return parser.get(section_name, setting_name, fallback=None)
+
+    @staticmethod
+    def is_using_legacy_fbx_importer():
+        value = unreal.SystemLibrary.get_console_variable_string_value(r'Interchange.FeatureFlags.Import.FBX')
+        return value.lower() in ['false', '0']
 
     @staticmethod
     def has_socket(asset_path, socket_name):