diff --git a/plugins/3MFReader/ThreeMFReader.py b/plugins/3MFReader/ThreeMFReader.py
index 38e7130070..2aa6fb27d3 100644
--- a/plugins/3MFReader/ThreeMFReader.py
+++ b/plugins/3MFReader/ThreeMFReader.py
@@ -92,7 +92,12 @@ class ThreeMFReader(MeshReader):
             um_node.setMeshData(mesh_data)
 
         for child in savitar_node.getChildren():
-            um_node.addChild(self._convertSavitarNodeToUMNode(child))
+            child_node = self._convertSavitarNodeToUMNode(child)
+            if child_node:
+                um_node.addChild(child_node)
+
+        if um_node.getMeshData() is None and len(um_node.getChildren()) == 0:
+            return None
 
         settings = savitar_node.getSettings()
 
@@ -152,6 +157,8 @@ class ThreeMFReader(MeshReader):
             self._unit = scene_3mf.getUnit()
             for node in scene_3mf.getSceneNodes():
                 um_node = self._convertSavitarNodeToUMNode(node)
+                if um_node is None:
+                    continue
                 # compensate for original center position, if object(s) is/are not around its zero position
 
                 transform_matrix = Matrix()
diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 3c9a946eef..f25899a065 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -1318,10 +1318,10 @@
                     "enabled": "expand_upper_skins or expand_lower_skins",
                     "settable_per_mesh": true
                 },
-                "min_skin_angle_for_expansion":
+                "max_skin_angle_for_expansion":
                 {
-                    "label": "Minimum Skin Angle for Expansion",
-                    "description": "Top and or bottom surfaces of your object with an angle larger than this setting, won't have their top/bottom skin expanded. This avoids expanding the narrow skin areas that are created when the model surface has a near vertical slope.",
+                    "label": "Maximum Skin Angle for Expansion",
+                    "description": "Top and or bottom surfaces of your object with an angle larger than this setting, won't have their top/bottom skin expanded. This avoids expanding the narrow skin areas that are created when the model surface has a near vertical slope. An angle of 0° is horizontal, while an angle of 90° is vertical.",
                     "unit": "°",
                     "type": "float",
                     "minimum_value": "0",