diff --git a/comfy/model_base.py b/comfy/model_base.py
index f55cbe183..6bc627ae3 100644
--- a/comfy/model_base.py
+++ b/comfy/model_base.py
@@ -1000,7 +1000,6 @@ class WAN21(BaseModel):
         device = kwargs["device"]
 
         if image is None:
-            image = torch.zeros_like(noise)
             shape_image = list(noise.shape)
             shape_image[1] = extra_channels
             image = torch.zeros(shape_image, dtype=noise.dtype, layout=noise.layout, device=noise.device)
diff --git a/comfy_extras/nodes_lt.py b/comfy_extras/nodes_lt.py
index fdc6c7c13..525889200 100644
--- a/comfy_extras/nodes_lt.py
+++ b/comfy_extras/nodes_lt.py
@@ -446,10 +446,9 @@ class LTXVPreprocess:
     CATEGORY = "image"
 
     def preprocess(self, image, img_compression):
-        if img_compression > 0:
-            output_images = []
-            for i in range(image.shape[0]):
-                output_images.append(preprocess(image[i], img_compression))
+        output_images = []
+        for i in range(image.shape[0]):
+            output_images.append(preprocess(image[i], img_compression))
         return (torch.stack(output_images),)