diff --git a/dumas_h3_latent_upscale.py b/dumas_h3_latent_upscale.py
index 62ce047..89f1b04 100644
--- a/dumas_h3_latent_upscale.py
+++ b/dumas_h3_latent_upscale.py
@@ -512,11 +512,11 @@ def _shrink_model_tile_param(param):
             return None
         next_param["grid_rows"] = rows
         next_param["grid_cols"] = cols
-        next_param["spatial_w_overlap"] = _halve_32(next_param.get("spatial_w_overlap", 0))
-        next_param["spatial_h_overlap"] = _halve_32(next_param.get("spatial_h_overlap", 0))
-        next_param["fade_width"] = _halve_32(next_param.get("fade_width", 0))
-        next_param["fade_height"] = _halve_32(next_param.get("fade_height", 0))
-        next_param["min_tile_size"] = _halve_32(next_param.get("min_tile_size", 0))
+        next_param["spatial_w_overlap"] = 0
+        next_param["spatial_h_overlap"] = 0
+        next_param["fade_width"] = 0
+        next_param["fade_height"] = 0
+        next_param["min_tile_size"] = 32
         return next_param
 
     tile_w = int(next_param.get("tile_width", 0) or 0)
diff --git a/tests/test_dumas_h3_longvideos.py b/tests/test_dumas_h3_longvideos.py
index 6ac5541..8e429ed 100644
--- a/tests/test_dumas_h3_longvideos.py
+++ b/tests/test_dumas_h3_longvideos.py
@@ -1181,6 +1181,27 @@ class DumasH3LongVideosHelperTests(unittest.TestCase):
         self.assertEqual(smaller["fade_height"], 0)
         self.assertEqual(smaller["min_tile_size"], 32)
 
+    def test_shrink_model_tile_param_rows_cols_resets_overlap(self):
+        latent = importlib.import_module("dumas_h3_latent_upscale")
+        smaller = latent._shrink_model_tile_param({
+            "tile_size_mode": "rows_cols",
+            "grid_rows": 4,
+            "grid_cols": 4,
+            "spatial_w_overlap": 128,
+            "spatial_h_overlap": 128,
+            "fade_width": 64,
+            "fade_height": 64,
+            "min_tile_size": 256,
+        })
+        self.assertIsNotNone(smaller)
+        self.assertEqual(smaller["grid_rows"], 8)
+        self.assertEqual(smaller["grid_cols"], 8)
+        self.assertEqual(smaller["spatial_w_overlap"], 0)
+        self.assertEqual(smaller["spatial_h_overlap"], 0)
+        self.assertEqual(smaller["fade_width"], 0)
+        self.assertEqual(smaller["fade_height"], 0)
+        self.assertEqual(smaller["min_tile_size"], 32)
+
     def test_temporal_segments_split_long_sequences(self):
         latent = importlib.import_module("dumas_h3_latent_upscale")
         bounds = latent._temporal_segments(36, 85, 17)