Merge branch seed configs in scene pair output

node_scene.py

@@ -475,6 +475,13 @@ def _merge_seed_config(seed_config: Any, axes: tuple[str, ...], seed: int) -> st
     return _dump(config)
 
 
+def _combined_seed_config(*seed_configs: Any) -> str:
+    combined: dict[str, Any] = {}
+    for seed_config in seed_configs:
+        combined.update(_json_dict(seed_config))
+    return _dump(combined) if combined else ""
+
+
 def _apply_layer_seed(scene: dict[str, Any], layer_name: str, seed_options: Any, branch_name: str = "") -> None:
     items = _seed_option_items(seed_options)
     if not items:
@@ -2284,7 +2291,7 @@ class SxCPScenePairOutput:
             no_black=False,
             trigger=str(soft_scene.get("trigger") or "sxcpinup_coloredpencil"),
             prepend_trigger_to_prompt=bool(soft_scene.get("prepend_trigger_to_prompt", True)),
-            seed_config=base_configs["seed_config"] or hard_configs["seed_config"],
+            seed_config=_combined_seed_config(base_configs["seed_config"], hard_configs["seed_config"]),
             options_json=options_json,
             filter_config=base_configs["filter_config"] or hard_configs["filter_config"],
             camera_config=base_configs["camera_config"],