From ea67e35a455d45b1a44ba739d7e554b04f88ce3f Mon Sep 17 00:00:00 2001
From: Gee <17325189+GeeCastro@users.noreply.github.com>
Date: Thu, 5 Feb 2026 11:32:06 +0000
Subject: [PATCH] add sum case to blend node

---
 comfy_extras/nodes_post_processing.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/comfy_extras/nodes_post_processing.py b/comfy_extras/nodes_post_processing.py
index a52a90e2c..7ac83ca64 100644
--- a/comfy_extras/nodes_post_processing.py
+++ b/comfy_extras/nodes_post_processing.py
@@ -24,7 +24,7 @@ class Blend(io.ComfyNode):
                 io.Image.Input("image1"),
                 io.Image.Input("image2"),
                 io.Float.Input("blend_factor", default=0.5, min=0.0, max=1.0, step=0.01),
-                io.Combo.Input("blend_mode", options=["normal", "multiply", "screen", "overlay", "soft_light", "difference"]),
+                io.Combo.Input("blend_mode", options=["normal", "multiply", "screen", "overlay", "soft_light", "difference", "sum"]),
             ],
             outputs=[
                 io.Image.Output(),
@@ -59,6 +59,8 @@ class Blend(io.ComfyNode):
             return torch.where(img2 <= 0.5, img1 - (1 - 2 * img2) * img1 * (1 - img1), img1 + (2 * img2 - 1) * (cls.g(img1) - img1))
         elif mode == "difference":
             return img1 - img2
+        elif mode == "sum":
+            return img1 + img2
         raise ValueError(f"Unsupported blend mode: {mode}")
 
     @classmethod