diff --git a/app/api/canvas/local-edit/route.ts b/app/api/canvas/local-edit/route.ts
index 0eb22276e..8b7be22ad 100644
--- a/app/api/canvas/local-edit/route.ts
+++ b/app/api/canvas/local-edit/route.ts
@@ -1178,7 +1178,9 @@ function formatScaleAdjustWashColor(
 function buildScaleAdjustSourceFootprintWashSvg(params: {
   boxes: Array<{
     background?: { b: number; g: number; r: number } | null;
+    innerOpacity?: number;
     left: number;
+    opacity?: number;
     top: number;
     width: number;
     height: number;
@@ -1220,11 +1222,19 @@ function buildScaleAdjustSourceFootprintWashSvg(params: {
       const innerRight = Math.min(width, box.left + box.width - pad);
       const innerBottom = Math.min(height, box.top + box.height - pad);
       const fill = formatScaleAdjustWashColor(box.background);
+      const opacity =
+        typeof box.opacity === "number"
+          ? clamp(box.opacity, 0, 1)
+          : SCALE_ADJUST_LAYOUT_GUIDE_WASH_OPACITY;
+      const innerOpacity =
+        typeof box.innerOpacity === "number"
+          ? clamp(box.innerOpacity, 0, 1)
+          : 0.18;
       const inner =
         innerRight > innerLeft + 4 && innerBottom > innerTop + 4
-          ? `<rect x="${innerLeft}" y="${innerTop}" width="${innerRight - innerLeft}" height="${innerBottom - innerTop}" rx="${Math.max(4, Math.round(radius * 0.65))}" ry="${Math.max(4, Math.round(radius * 0.65))}" fill="${fill}" fill-opacity="0.18" filter="url(#soft-wash-${index})" />`
+          ? `<rect x="${innerLeft}" y="${innerTop}" width="${innerRight - innerLeft}" height="${innerBottom - innerTop}" rx="${Math.max(4, Math.round(radius * 0.65))}" ry="${Math.max(4, Math.round(radius * 0.65))}" fill="${fill}" fill-opacity="${innerOpacity}" filter="url(#soft-wash-${index})" />`
           : "";
-      return `<rect x="${left}" y="${top}" width="${rectWidth}" height="${rectHeight}" rx="${radius}" ry="${radius}" fill="${fill}" fill-opacity="${SCALE_ADJUST_LAYOUT_GUIDE_WASH_OPACITY}" filter="url(#soft-wash-${index})" />${inner}`;
+      return `<rect x="${left}" y="${top}" width="${rectWidth}" height="${rectHeight}" rx="${radius}" ry="${radius}" fill="${fill}" fill-opacity="${opacity}" filter="url(#soft-wash-${index})" />${inner}`;
     })
     .join("");
 
@@ -2602,7 +2612,9 @@ async function buildScaleAdjustVisualLayoutGuideBuffer(params: {
       : null;
   const sourceFootprintBoxes: Array<{
     background?: { b: number; g: number; r: number } | null;
+    innerOpacity?: number;
     left: number;
+    opacity?: number;
     top: number;
     width: number;
     height: number;
@@ -2657,6 +2669,18 @@ async function buildScaleAdjustVisualLayoutGuideBuffer(params: {
       if (structureLockAppliedRef) {
         structureLockAppliedRef.value = true;
       }
+      sourceFootprintBoxes.push({
+        ...placement.sourceFootprintBox,
+        background: sourceRaw
+          ? estimateScaleAdjustBoxBackground({
+              box: placement.sourceFootprintBox,
+              raw: sourceRaw,
+              width: sourceWidth,
+            })
+          : null,
+        innerOpacity: 0.36,
+        opacity: 0.72,
+      });
       subjectWashComposites.push(structureLockedComposite.wash);
       composites.push(structureLockedComposite.overlay);
       continue;