diff --git a/io_scene_psk_psa/psk/export/ui.py b/io_scene_psk_psa/psk/export/ui.py
index f12d2a5..f768b30 100644
--- a/io_scene_psk_psa/psk/export/ui.py
+++ b/io_scene_psk_psa/psk/export/ui.py
@@ -21,8 +21,23 @@ class PSK_UL_material_names(UIList):
         row = layout.row()
         item = typing_cast(PSK_PG_material_name_list_item, item)
         material = bpy.data.materials.get(item.material_name, None)
-        icon_value = layout.icon(material) if material else 0
-        row.prop(item, 'material_name', text='', emboss=False, icon_value=icon_value, icon='BLANK1' if icon_value == 0 else 'NONE')
+
+        # If the material is not found by name and the name is not 'None', show a not found icon
+        if item.material_name == 'None':
+            icon = 'NODE_MATERIAL'
+        else:
+            icon = 'NOT_FOUND' if material is None else 'NONE'
+
+        row.prop(item, 'material_name', text='', emboss=False,
+                 icon_value=layout.icon(material) if material else 0,
+                 icon=icon)
+
+        # Add right-aligned "Not Found" label if material is not found
+        if item.material_name != 'None' and material is None:
+            label_row = row.row()
+            label_row.alignment = 'RIGHT'
+            label_row.enabled = False
+            label_row.label(text='Not Found')
 
 
 _classes = (