Expand latent upscale spatial stitch controls

dumas_h3_latent_upscale.py

@@ -473,10 +473,12 @@ class H3LatentUpscaleParams:
                     "tooltip": "Width in pixels of the freeze-to-free transition inside each overlap strip. 0 freezes the whole strip, matching the upstream default."}),
                 "overlap_mode": (["earlier", "later"], {"default": "earlier",
                     "tooltip": "Which tile wins the overlap band when stitching the spatial batches back together."}),
+                "overlap_blend": (["linear", "smoothstep", "overwrite", "midpoint"], {"default": "linear",
+                    "tooltip": "How overlap bands are blended when the spatial batches are stitched back together."}),
             }
         }
 
-    def build(self, mode, model_name, method, width, height, device, precision, sampler_name, scheduler, steps, denoise, megapixels, tile_width, tile_height, overlap, fade_width, overlap_mode):
+    def build(self, mode, model_name, method, width, height, device, precision, sampler_name, scheduler, steps, denoise, megapixels, tile_width, tile_height, overlap, fade_width, overlap_mode, overlap_blend):
         width = int(width)
         height = int(height)
         steps = int(steps)
@@ -500,6 +502,7 @@ class H3LatentUpscaleParams:
                 "overlap": overlap,
                 "fade_width": fade_width,
                 "overlap_mode": overlap_mode,
+                "overlap_blend": overlap_blend,
             },)
         if width > 0:
             width = int(round(width / 32.0)) * 32
@@ -524,6 +527,7 @@ class H3LatentUpscaleParams:
             "overlap": overlap,
             "fade_width": fade_width,
             "overlap_mode": overlap_mode,
+            "overlap_blend": overlap_blend,
         },)