Support Stable Cascade in checkpoint format.

comfy/supported_models.py

@@ -319,6 +319,10 @@ class Stable_Cascade_C(supported_models_base.BASE):
         "shift": 2.0,
     }
 
+    vae_key_prefix = ["vae."]
+    text_encoder_key_prefix = ["text_encoder."]
+    clip_vision_prefix = "clip_l_vision."
+
     def process_unet_state_dict(self, state_dict):
         key_list = list(state_dict.keys())
         for y in ["weight", "bias"]:
@@ -355,6 +359,8 @@ class Stable_Cascade_B(Stable_Cascade_C):
         "shift": 1.0,
     }
 
+    clip_vision_prefix = None
+
     def get_model(self, state_dict, prefix="", device=None):
         out = model_base.StableCascade_B(self, device=device)
         return out