diff --git a/js/CanvasLayers.js b/js/CanvasLayers.js
index 5e86ca9..425913e 100644
--- a/js/CanvasLayers.js
+++ b/js/CanvasLayers.js
@@ -961,17 +961,13 @@ export class CanvasLayers {
     }
     async getLayerImageData(layer) {
         try {
-            const { canvas: tempCanvas, ctx: tempCtx } = createCanvas(layer.width, layer.height, '2d', { willReadFrequently: true });
+            const width = layer.originalWidth || layer.width;
+            const height = layer.originalHeight || layer.height;
+            const { canvas: tempCanvas, ctx: tempCtx } = createCanvas(width, height, '2d', { willReadFrequently: true });
             if (!tempCtx)
                 throw new Error("Could not create canvas context");
-            // We need to draw the layer relative to the new canvas, so we "move" it to 0,0
-            // by creating a temporary layer object for drawing.
-            const layerToDraw = {
-                ...layer,
-                x: 0,
-                y: 0,
-            };
-            this._drawLayer(tempCtx, layerToDraw);
+            // Use original image directly to ensure full quality
+            tempCtx.drawImage(layer.image, 0, 0, width, height);
             const dataUrl = tempCanvas.toDataURL('image/png');
             if (!dataUrl.startsWith('data:image/png;base64,')) {
                 throw new Error("Invalid image data format");
diff --git a/js/CanvasView.js b/js/CanvasView.js
index 6ed769f..27a9a7a 100644
--- a/js/CanvasView.js
+++ b/js/CanvasView.js
@@ -430,6 +430,8 @@ async function createCanvasWidget(node, widget, app) {
                             delete newLayer.imageId;
                             canvas.layers[selectedLayerIndex] = newLayer;
                             canvas.canvasSelection.updateSelection([newLayer]);
+                            // Invalidate processed image cache when layer image changes (matting)
+                            canvas.canvasLayers.invalidateProcessedImageCache(newLayer.id);
                             canvas.render();
                             canvas.saveState();
                             showSuccessNotification("Background removed successfully!");
diff --git a/src/CanvasLayers.ts b/src/CanvasLayers.ts
index 632ffbe..dee496a 100644
--- a/src/CanvasLayers.ts
+++ b/src/CanvasLayers.ts
@@ -1095,19 +1095,15 @@ export class CanvasLayers {
 
     async getLayerImageData(layer: Layer): Promise<string> {
         try {
-            const { canvas: tempCanvas, ctx: tempCtx } = createCanvas(layer.width, layer.height, '2d', { willReadFrequently: true });
+            const width = layer.originalWidth || layer.width;
+            const height = layer.originalHeight || layer.height;
+
+            const { canvas: tempCanvas, ctx: tempCtx } = createCanvas(width, height, '2d', { willReadFrequently: true });
             if (!tempCtx) throw new Error("Could not create canvas context");
 
-            // We need to draw the layer relative to the new canvas, so we "move" it to 0,0
-            // by creating a temporary layer object for drawing.
-            const layerToDraw = {
-                ...layer,
-                x: 0,
-                y: 0,
-            };
-
-            this._drawLayer(tempCtx, layerToDraw);
-
+            // Use original image directly to ensure full quality
+            tempCtx.drawImage(layer.image, 0, 0, width, height);
+            
             const dataUrl = tempCanvas.toDataURL('image/png');
             if (!dataUrl.startsWith('data:image/png;base64,')) {
                 throw new Error("Invalid image data format");
diff --git a/src/CanvasView.ts b/src/CanvasView.ts
index 7aea28d..51868e0 100644
--- a/src/CanvasView.ts
+++ b/src/CanvasView.ts
@@ -515,6 +515,10 @@ async function createCanvasWidget(node: ComfyNode, widget: any, app: ComfyApp):
                             
                             canvas.layers[selectedLayerIndex] = newLayer;
                             canvas.canvasSelection.updateSelection([newLayer]);
+                            
+                            // Invalidate processed image cache when layer image changes (matting)
+                            canvas.canvasLayers.invalidateProcessedImageCache(newLayer.id);
+                            
                             canvas.render();
                             canvas.saveState();
                             showSuccessNotification("Background removed successfully!");