diff --git a/lib/src/crop_controller.dart b/lib/src/crop_controller.dart
index ee628ff..e28f0fc 100644
--- a/lib/src/crop_controller.dart
+++ b/lib/src/crop_controller.dart
@@ -186,11 +186,14 @@ class CropController extends ValueNotifier<CropControllerValue> {
   /// Returns the bitmap cropped with the current crop rectangle.
   ///
   /// [maxSize] is the maximum width or height you want.
+  /// [overlayPainter] is an optional painter on top of the cropped image;
+  /// could be used for special effects on the cropped area.
   /// You can provide the [quality] used in the resizing operation.
   /// Returns an [ui.Image] asynchronously.
   Future<ui.Image> croppedBitmap({
     final double? maxSize,
     final ui.FilterQuality quality = FilterQuality.high,
+    final CustomPainter? overlayPainter,
   }) async =>
       getCroppedBitmap(
         maxSize: maxSize,
@@ -198,11 +201,14 @@ class CropController extends ValueNotifier<CropControllerValue> {
         crop: crop,
         rotation: value.rotation,
         image: _bitmap!,
+        overlayPainter: overlayPainter,
       );
 
   /// Returns the bitmap cropped with parameters.
   ///
   /// [maxSize] is the maximum width or height you want.
+  /// [overlayPainter] is an optional painter on top of the cropped image;
+  /// could be used for special effects on the cropped area.
   /// The [crop] `Rect` is normalized to (0, 0) x (1, 1).
   /// You can provide the [quality] used in the resizing operation.
   static Future<ui.Image> getCroppedBitmap({
@@ -211,6 +217,7 @@ class CropController extends ValueNotifier<CropControllerValue> {
     required final Rect crop,
     required final CropRotation rotation,
     required final ui.Image image,
+    final CustomPainter? overlayPainter,
   }) async {
     final ui.PictureRecorder pictureRecorder = ui.PictureRecorder();
     final Canvas canvas = Canvas(pictureRecorder);
@@ -286,20 +293,34 @@ class CropController extends ValueNotifier<CropControllerValue> {
       canvas.restore();
     }
 
+    final double outputWidth = cropWidth * factor;
+    final double outputHeight = cropHeight * factor;
+    overlayPainter?.paint(canvas, ui.Size(outputWidth, outputHeight));
+
     //FIXME Picture.toImage() crashes on Flutter Web with the HTML renderer. Use CanvasKit or avoid this operation for now. https://github.com/flutter/engine/pull/20750
-    return await pictureRecorder
-        .endRecording()
-        .toImage((cropWidth * factor).round(), (cropHeight * factor).round());
+    return await pictureRecorder.endRecording().toImage(
+          outputWidth.round(),
+          outputHeight.round(),
+        );
   }
 
   /// Returns the image cropped with the current crop rectangle.
   ///
   /// You can provide the [quality] used in the resizing operation.
+  /// [overlayPainter] is an optional painter on top of the cropped image;
+  /// could be used for special effects on the cropped area.
   /// Returns an [Image] asynchronously.
-  Future<Image> croppedImage(
-      {ui.FilterQuality quality = FilterQuality.high}) async {
+  Future<Image> croppedImage({
+    ui.FilterQuality quality = FilterQuality.high,
+    final CustomPainter? overlayPainter,
+  }) async {
     return Image(
-      image: UiImageProvider(await croppedBitmap(quality: quality)),
+      image: UiImageProvider(
+        await croppedBitmap(
+          quality: quality,
+          overlayPainter: overlayPainter,
+        ),
+      ),
       fit: BoxFit.contain,
     );
   }
diff --git a/lib/src/crop_image.dart b/lib/src/crop_image.dart
index a117732..4531701 100644
--- a/lib/src/crop_image.dart
+++ b/lib/src/crop_image.dart
@@ -107,6 +107,11 @@ class CropImage extends StatefulWidget {
   /// When `false`, moves when panning beyond corners but inside the crop rect.
   final bool alwaysMove;
 
+  /// An optional painter between the image and the crop grid.
+  ///
+  /// Could be used for special effects on the cropped area.
+  final CustomPainter? overlayPainter;
+
   const CropImage({
     Key? key,
     this.controller,
@@ -126,6 +131,7 @@ class CropImage extends StatefulWidget {
     this.minimumImageSize = 100,
     this.maximumImageSize = double.infinity,
     this.alwaysMove = false,
+    this.overlayPainter,
   })  : gridInnerColor = gridInnerColor ?? gridColor,
         gridCornerColor = gridCornerColor ?? gridColor,
         assert(gridCornerSize > 0, 'gridCornerSize cannot be zero'),
@@ -293,6 +299,12 @@ class _CropImageState extends State<CropImage> {
                     ),
                   ),
                 ),
+                if (widget.overlayPainter != null)
+                  SizedBox(
+                    width: width,
+                    height: height,
+                    child: CustomPaint(painter: widget.overlayPainter),
+                  ),
                 SizedBox(
                   width: width + 2 * widget.paddingSize,
                   height: height + 2 * widget.paddingSize,