diff --git a/api/onnx_web/chain/tile.py b/api/onnx_web/chain/tile.py
index f8fe5e8d..f600d06b 100644
--- a/api/onnx_web/chain/tile.py
+++ b/api/onnx_web/chain/tile.py
@@ -317,12 +317,12 @@ def process_tile_stack(
             if mask:
                 tile_mask = mask.crop((left, top, right, bottom))
 
-        if isinstance(tile_stack, list):
-            tile_stack = StageResult.from_images(tile_stack)
-
         for image_filter in filters:
             tile_stack = image_filter(tile_stack, tile_mask, (left, top, tile))
 
+        if isinstance(tile_stack, list):
+            tile_stack = StageResult.from_images(tile_stack)
+
         tiles.append((left, top, tile_stack.as_image()))
 
     lefts, tops, stacks = list(zip(*tiles))