Add validation and documentation to VAE tiling.

nodes.py

@@ -2541,14 +2541,28 @@ class WanVideoDecode:
         return {"required": {
                     "vae": ("WANVAE",),
                     "samples": ("LATENT",),
-                    "enable_vae_tiling": ("BOOLEAN", {"default": False, "tooltip": "Drastically reduces memory use but may introduce seams"}),
-                    "tile_x": ("INT", {"default": 272, "min": 64, "max": 2048, "step": 1, "tooltip": "Tile size in pixels, smaller values use less VRAM, may introduce more seams"}),
-                    "tile_y": ("INT", {"default": 272, "min": 64, "max": 2048, "step": 1, "tooltip": "Tile size in pixels, smaller values use less VRAM, may introduce more seams"}),
-                    "tile_stride_x": ("INT", {"default": 144, "min": 32, "max": 2048, "step": 32, "tooltip": "Tile stride in pixels, smaller values use less VRAM, may introduce more seams"}),
-                    "tile_stride_y": ("INT", {"default": 128, "min": 32, "max": 2048, "step": 32, "tooltip": "Tile stride in pixels, smaller values use less VRAM, may introduce more seams"}),
+                    "enable_vae_tiling": ("BOOLEAN", {"default": False, "tooltip": (
+                        "Drastically reduces memory use but will introduce seams at tile stride boundaries. "
+                        "The location and number of seams is dictated by the tile stride size. "
+                        "The visibility of seams can be controlled by increasing the tile size. "
+                        "Seams become less obvious at 1.5x stride and are barely noticeable at 2x stride size. "
+                        "Which is to say if you use a stride width of 160, the seams are barely noticeable with a tile width of 320."
+                    )}),
+                    "tile_x": ("INT", {"default": 272, "min": 40, "max": 2048, "step": 8, "tooltip": "Tile width in pixels. Smaller values use less VRAM but will make seams more obvious."}),
+                    "tile_y": ("INT", {"default": 272, "min": 40, "max": 2048, "step": 8, "tooltip": "Tile height in pixels. Smaller values use less VRAM but will make seams more obvious."}),
+                    "tile_stride_x": ("INT", {"default": 144, "min": 32, "max": 2040, "step": 8, "tooltip": "Tile stride width in pixels. Smaller values use less VRAM but will introduce more seams."}),
+                    "tile_stride_y": ("INT", {"default": 128, "min": 32, "max": 2040, "step": 8, "tooltip": "Tile stride height in pixels. Smaller values use less VRAM but will introduce more seams."}),
                     },
                 }
 
+    @classmethod
+    def VALIDATE_INPUTS(s, tile_x, tile_y, tile_stride_x, tile_stride_y):
+        if tile_x <= tile_stride_x:
+            return "Tile width must be larger than the tile stride width."
+        if tile_y <= tile_stride_y:
+            return "Tile height must be larger than the tile stride height."
+        return True
+
     RETURN_TYPES = ("IMAGE",)
     RETURN_NAMES = ("images",)
     FUNCTION = "decode"