Update generator.py

generator.py

@@ -384,7 +384,10 @@ class RetroArtConverter:
             
         elif using_multiple_controlnets and not has_detected_faces:
             print("Multiple ControlNets available but no faces detected, using depth only")
-            control_image = [depth_image, depth_image]
+            # The InstantID controlnet (index 0) still needs an image input.
+            # We provide a blank image and set its scale to 0.0 to disable it.
+            blank_image = Image.new("RGB", depth_image.size, (0, 0, 0))
+            control_image = [blank_image, depth_image]
             conditioning_scales = [0.0, depth_control_scale]
             face_embeddings = None