diff --git a/app/api/canvas/local-edit/route.ts b/app/api/canvas/local-edit/route.ts
index 7ee9fb4b8..6e4ad5593 100644
--- a/app/api/canvas/local-edit/route.ts
+++ b/app/api/canvas/local-edit/route.ts
@@ -128,6 +128,7 @@ type ScaleAdjustPatchReference = {
   compositeClipMaskUrl?: string | null;
   productLockMethod?: string | null;
   productLockEditMaskUrl?: string | null;
+  productLockFalEditMaskUrl?: string | null;
   productLockOverlayUrl?: string | null;
   productLockProtectMaskUrl?: string | null;
   sourceCropUrl: string;
@@ -2262,6 +2263,36 @@ async function buildScaleAdjustTransparentEditMaskFromOpacityMask(params: {
     .toBuffer();
 }
 
+async function buildScaleAdjustOpaqueEditMaskFromOpacityMask(params: {
+  height: number;
+  maskBuffer: Buffer;
+  width: number;
+}) {
+  const { height, maskBuffer, width } = params;
+  const editAlpha = await sharp(maskBuffer, { failOn: "none" })
+    .rotate()
+    .resize(width, height, { fit: "fill" })
+    .ensureAlpha()
+    .extractChannel(3)
+    .greyscale()
+    .raw()
+    .toBuffer();
+  const rgba = Buffer.alloc(width * height * 4);
+  for (let index = 0; index < width * height; index += 1) {
+    const offset = index * 4;
+    const value = editAlpha[index] || 0;
+    rgba[offset] = value;
+    rgba[offset + 1] = value;
+    rgba[offset + 2] = value;
+    rgba[offset + 3] = 255;
+  }
+  return sharp(rgba, {
+    raw: { channels: 4, height, width },
+  })
+    .png({ compressionLevel: 9 })
+    .toBuffer();
+}
+
 function getScaleAdjustAlphaBoundingBox(params: {
   height: number;
   rawRgba: Buffer;
@@ -3738,12 +3769,21 @@ async function buildScaleAdjustVisualLayoutGuideBuffer(params: {
           width: sourceWidth,
         })
       : null;
+  const productLockFalEditMaskBuffer =
+    productLockComposites.length && compositeClipMaskBuffer
+      ? await buildScaleAdjustOpaqueEditMaskFromOpacityMask({
+          height: sourceHeight,
+          maskBuffer: compositeClipMaskBuffer,
+          width: sourceWidth,
+        })
+      : null;
 
   return {
     backgroundPlateBuffer,
     buffer,
     compositeClipMaskBuffer,
     productLockEditMaskBuffer,
+    productLockFalEditMaskBuffer,
     productLockOverlayBuffer,
     productLockProtectMaskBuffer,
   };
@@ -3796,6 +3836,7 @@ async function createScaleAdjustPatchReference(params: {
       productLockProtectMaskUpload,
       compositeClipMaskUpload,
       productLockEditMaskUpload,
+      productLockFalEditMaskUpload,
     ] = await Promise.all([
       uploadFile(
         `canvas-scale-adjust-full-target-draft-${suffix}.png`,
@@ -3831,6 +3872,12 @@ async function createScaleAdjustPatchReference(params: {
             toArrayBuffer(targetDraftReference.productLockEditMaskBuffer)
           )
         : Promise.resolve(null),
+      targetDraftReference.productLockFalEditMaskBuffer
+        ? uploadFile(
+            `canvas-scale-adjust-product-lock-fal-edit-mask-${suffix}.png`,
+            toArrayBuffer(targetDraftReference.productLockFalEditMaskBuffer)
+          )
+        : Promise.resolve(null),
     ]);
 
     return {
@@ -3838,6 +3885,7 @@ async function createScaleAdjustPatchReference(params: {
       compositeClipMaskUrl: compositeClipMaskUpload?.url || null,
       productLockMethod: productLockOverlayUpload ? "rmbg-cutout" : null,
       productLockEditMaskUrl: productLockEditMaskUpload?.url || null,
+      productLockFalEditMaskUrl: productLockFalEditMaskUpload?.url || null,
       productLockOverlayUrl: productLockOverlayUpload?.url || null,
       productLockProtectMaskUrl: productLockProtectMaskUpload?.url || null,
       sourceCropUrl: sourceImageUrl || targetDraftFullUpload.url,
@@ -3868,6 +3916,7 @@ async function createScaleAdjustPatchReference(params: {
     productLockProtectMaskUpload,
     compositeClipMaskUpload,
     productLockEditMaskUpload,
+    productLockFalEditMaskUpload,
   ] = await Promise.all([
     uploadFile(
       `canvas-scale-adjust-workspace-source-${suffix}.png`,
@@ -3911,6 +3960,12 @@ async function createScaleAdjustPatchReference(params: {
           toArrayBuffer(targetDraftReference.productLockEditMaskBuffer)
         )
       : Promise.resolve(null),
+    targetDraftReference.productLockFalEditMaskBuffer
+      ? uploadFile(
+          `canvas-scale-adjust-product-lock-fal-edit-mask-${suffix}.png`,
+          toArrayBuffer(targetDraftReference.productLockFalEditMaskBuffer)
+        )
+      : Promise.resolve(null),
   ]);
 
   return {
@@ -3918,6 +3973,7 @@ async function createScaleAdjustPatchReference(params: {
     compositeClipMaskUrl: compositeClipMaskUpload?.url || null,
     productLockMethod: productLockOverlayUpload ? "rmbg-cutout" : null,
     productLockEditMaskUrl: productLockEditMaskUpload?.url || null,
+    productLockFalEditMaskUrl: productLockFalEditMaskUpload?.url || null,
     productLockOverlayUrl: productLockOverlayUpload?.url || null,
     productLockProtectMaskUrl: productLockProtectMaskUpload?.url || null,
     sourceCropUrl: sourceCropUpload.url,
@@ -5316,9 +5372,6 @@ export async function POST(request: NextRequest) {
                 scalePercent,
                 { width: sourceWidth, height: sourceHeight },
                 {
-                  backgroundReference:
-                    useScaleAdjustProductLockMaskEdit &&
-                    Boolean(scaleAdjustPatchReference?.backgroundPlateFullUrl),
                   maskEdit: useScaleAdjustProductLockMaskEdit,
                 }
               )
@@ -5394,9 +5447,6 @@ export async function POST(request: NextRequest) {
             ? useScaleAdjustProductLockMaskEdit
               ? [
                   sourceImageUrl,
-                  ...(scaleAdjustPatchReference.backgroundPlateFullUrl
-                    ? [scaleAdjustPatchReference.backgroundPlateFullUrl]
-                    : []),
                   ...scaleAdjustCropReferenceImageUrls,
                   ...manualRegionReferenceImageUrls,
                 ]
@@ -5581,6 +5631,8 @@ export async function POST(request: NextRequest) {
           useScaleAdjustProductLockMaskEdit,
         scaleAdjustProductLockEditMaskUrl:
           scaleAdjustPatchReference?.productLockEditMaskUrl || null,
+        scaleAdjustProductLockFalEditMaskUrl:
+          scaleAdjustPatchReference?.productLockFalEditMaskUrl || null,
         scaleAdjustProductLockOverlayUrl:
           scaleAdjustPatchReference?.productLockOverlayUrl || null,
         scaleAdjustProductLockProtectMaskUrl:
@@ -5706,6 +5758,9 @@ export async function POST(request: NextRequest) {
       promptExtend: false,
       providerImageParams: useScaleAdjustProductLockMaskEdit
         ? {
+            falMaskImageUrl:
+              scaleAdjustPatchReference?.productLockFalEditMaskUrl ||
+              (scaleAdjustPatchReference?.productLockEditMaskUrl as string),
             maskImageUrl:
               scaleAdjustPatchReference?.productLockEditMaskUrl as string,
           }
diff --git a/lib/ai/providers/fal-image.ts b/lib/ai/providers/fal-image.ts
index b4e8f37fc..930815fe8 100644
--- a/lib/ai/providers/fal-image.ts
+++ b/lib/ai/providers/fal-image.ts
@@ -21,6 +21,7 @@ interface FalImageParams {
   safetyTolerance?: string | number;
   seed?: string | number;
   enableWebSearch?: boolean;
+  falMaskImageUrl?: string;
   quality?: string;
   maskImageUrl?: string;
   openaiApiKey?: string;
@@ -690,7 +691,9 @@ function buildFalRequestPayload(params: {
       output_format: outputFormat,
     };
 
-    const maskImageUrl = normalizeOptionalHttpUrl(params.imageParams?.maskImageUrl);
+    const maskImageUrl =
+      normalizeOptionalHttpUrl(params.imageParams?.falMaskImageUrl) ||
+      normalizeOptionalHttpUrl(params.imageParams?.maskImageUrl);
     if (maskImageUrl) {
       input.mask_url = maskImageUrl;
     }