materialx/nodes/generate_node_classes.py

@@ -133,6 +133,8 @@ def generate_property_code(mx_param, category):
     if mx_type == 'filename' and category in ("texture2d", "texture3d"):
         prop_attr_strings.insert(0, "type=bpy.types.Image")
 
+    prop_attr_strings.append('update=MxNode.update_prop')
+
     return f"{prop_type}({', '.join(prop_attr_strings)})"
 
 

materialx/nodes/node.py

@@ -78,6 +78,9 @@ class MxNode(bpy.types.ShaderNode):
     _ui_folders = ()    # list of ui folders mentioned in nodedef
     category = ""
 
+    def update_prop(self, context):
+        self.socket_value_update(context)
+
     @classmethod
     def get_nodedef(cls, data_type):
         if not cls._data_types[data_type]['nd']:
@@ -120,6 +123,7 @@ class MxNode(bpy.types.ShaderNode):
 
     def update(self):
         bpy.app.timers.register(self.mark_invalid_links)
+        self.socket_value_update(bpy.context)
 
     def mark_invalid_links(self):
         if not is_mx_node_valid(self):
@@ -150,6 +154,8 @@ class MxNode(bpy.types.ShaderNode):
         for i, nd_output in enumerate(nodedef.getActiveOutputs()):
             self.outputs[i].name = nd_output.getName()
 
+        self.update_prop(context)
+
     def init(self, context):
         nodedef = self.nodedef
 
@@ -368,6 +374,9 @@ class MxNode(bpy.types.ShaderNode):
             if f:
                 self.inputs[i].hide = not getattr(self, self._folder_prop_name(f))
 
+        if context:
+            self.update_prop(context)
+
     def check_ui_folders(self):
         if not self._ui_folders:
             return