diff --git a/comfy_api/v3/io.py b/comfy_api/v3/io.py
index e8cf8fea5..6351432ca 100644
--- a/comfy_api/v3/io.py
+++ b/comfy_api/v3/io.py
@@ -211,7 +211,7 @@ class WidgetInputV3(InputV3):
 
 
 class OutputV3(IO_V3):
-    def __init__(self, id: str, display_name: str=None, tooltip: str=None,
+    def __init__(self, id: str=None, display_name: str=None, tooltip: str=None,
                  is_output_list=False):
         self.id = id
         self.display_name = display_name
@@ -790,6 +790,10 @@ class DynamicOutput(OutputV3, ABC):
     '''
     Abstract class for dynamic output registration.
     '''
+    def __init__(self, id: str, display_name: str=None, tooltip: str=None,
+                 is_output_list=False):
+        super().__init__(id, display_name, tooltip, is_output_list)
+
     @abstractmethod
     def get_dynamic(self) -> list[OutputV3]:
         ...
@@ -991,7 +995,7 @@ class SchemaV3:
             raise ValueError("\n".join(issues))
 
     def finalize(self):
-        """Add hidden based on selected schema options."""
+        """Add hidden based on selected schema options, and give outputs without ids default ids."""
         # if is an api_node, will need key-related hidden
         if self.is_api_node:
             if self.hidden is None:
@@ -1008,6 +1012,11 @@ class SchemaV3:
                 self.hidden.append(Hidden.prompt)
             if Hidden.extra_pnginfo not in self.hidden:
                 self.hidden.append(Hidden.extra_pnginfo)
+        # give outputs without ids default ids
+        if self.outputs is not None:
+            for i, output in enumerate(self.outputs):
+                if output.id is None:
+                    output.id = f"_{i}_{output.io_type}_"
 
 
 class Serializer:
diff --git a/comfy_extras/nodes_v3_test.py b/comfy_extras/nodes_v3_test.py
index 55f179f2a..6f2d21895 100644
--- a/comfy_extras/nodes_v3_test.py
+++ b/comfy_extras/nodes_v3_test.py
@@ -62,8 +62,8 @@ class V3TestNode(io.ComfyNodeV3):
                 #                                                   ]]
             ],
             outputs=[
-                io.Int.Output("int_output"),
-                io.Image.Output("img_output", display_name="img🖼️", tooltip="This is an image"),
+                io.Int.Output(),
+                io.Image.Output(display_name="img🖼️", tooltip="This is an image"),
             ],
             hidden=[
                 io.Hidden.prompt,
@@ -142,8 +142,8 @@ class V3LoraLoader(io.ComfyNodeV3):
                 ),
             ],
             outputs=[
-                io.Model.Output("model_out"),
-                io.Clip.Output("clip_out"),
+                io.Model.Output(),
+                io.Clip.Output(),
             ],
         )
 
@@ -169,7 +169,7 @@ class NInputsTest(io.ComfyNodeV3):
                 io.AutogrowDynamic.Input("nmock2", template_input=io.Int.Input("int"), optional=True, min=1, max=4),
             ],
             outputs=[
-                io.Image.Output("image_out"),
+                io.Image.Output(),
             ],
         )
     
diff --git a/comfy_extras/v3/nodes_images.py b/comfy_extras/v3/nodes_images.py
index c13dadd22..105904581 100644
--- a/comfy_extras/v3/nodes_images.py
+++ b/comfy_extras/v3/nodes_images.py
@@ -87,7 +87,7 @@ class PreviewImage_V3(io.ComfyNodeV3):
 
     @classmethod
     def execute(cls, images):
-        return io.NodeOutput(ui=ui.PreviewImage(images))
+        return io.NodeOutput(ui=ui.PreviewImage(images, cls=cls))
 
 
 class LoadImage_V3(io.ComfyNodeV3):
@@ -107,12 +107,8 @@ class LoadImage_V3(io.ComfyNodeV3):
                 ),
             ],
             outputs=[
-                io.Image.Output(
-                    "IMAGE",
-                ),
-                io.Mask.Output(
-                    "MASK",
-                ),
+                io.Image.Output(),
+                io.Mask.Output(),
             ],
         )
 
@@ -207,12 +203,8 @@ class LoadImageOutput_V3(io.ComfyNodeV3):
                 ),
             ],
             outputs=[
-                io.Image.Output(
-                    "IMAGE",
-                ),
-                io.Mask.Output(
-                    "MASK",
-                ),
+                io.Image.Output(),
+                io.Mask.Output(),
             ],
         )
 
diff --git a/comfy_extras/v3/nodes_webcam.py b/comfy_extras/v3/nodes_webcam.py
index c63352803..3a4cf8da0 100644
--- a/comfy_extras/v3/nodes_webcam.py
+++ b/comfy_extras/v3/nodes_webcam.py
@@ -39,7 +39,7 @@ class WebcamCapture_V3(io.ComfyNodeV3):
                 io.Boolean.Input("capture_on_queue", default=True),
             ],
             outputs=[
-                io.Image.Output("IMAGE"),
+                io.Image.Output(),
             ],
         )