Fix MultiModifiers not being added to new SceneObjects.

korman/exporter/manager.py

@@ -212,7 +212,19 @@ class ExportManager:
             else:
                 name = so.key.name
 
-        return self._keys.get((location, pClass, name), None)
+        key = self._keys.get((location, pClass, name), None)
+        if key is not None and so is not None:
+            # Purposefully not checking for plObjInterface -- they should never be shared.
+            if isinstance(pClass, plModifier):
+                if key not in so.modifiers:
+                    # We really shouldn't add plSingleModifiers to multiple objects. This may
+                    # potentially cause URU to crash. I'm uncertain though, so we'll just warn
+                    # for now.
+                    if isinstance(pClass, plSingleModifier):
+                        self._exporter().report.warn("Adding SingleModifier '{}' (type: '{}'') to another SceneObject '{}'",
+                                                     key.name, pClass.__name__[2:], so.key.name)
+                    so.addModifier(key)
+        return key
 
     def find_create_object(self, pClass, bl=None, name=None, so=None):
         key = self.find_key(pClass, bl, name, so)