diff --git a/src/Classes/SelectionMap.gd b/src/Classes/SelectionMap.gd
index 49c504343..08059b92e 100644
--- a/src/Classes/SelectionMap.gd
+++ b/src/Classes/SelectionMap.gd
@@ -85,6 +85,15 @@ func invert() -> void:
 	self.convert(Image.FORMAT_LA8)
 
 
+## Returns a copy of itself that is cropped to [param size].
+## Used for when the selection map is bigger than the [Project] size.
+func return_cropped_copy(size: Vector2i) -> SelectionMap:
+	var selection_map_copy := SelectionMap.new()
+	selection_map_copy.copy_from(self)
+	selection_map_copy.crop(size.x, size.y)
+	return selection_map_copy
+
+
 func move_bitmap_values(project: Project, move_offset := true) -> void:
 	var size := project.size
 	var selection_node = Global.canvas.selection
diff --git a/src/Tools/Bucket.gd b/src/Tools/Bucket.gd
index 4e1bc1f62..6547b0553 100644
--- a/src/Tools/Bucket.gd
+++ b/src/Tools/Bucket.gd
@@ -257,10 +257,7 @@ func fill_in_selection() -> void:
 			var filler := Image.create(project.size.x, project.size.y, false, Image.FORMAT_RGBA8)
 			filler.fill(tool_slot.color)
 			var rect: Rect2i = Global.canvas.selection.big_bounding_rectangle
-			var selection_map_copy := SelectionMap.new()
-			selection_map_copy.copy_from(project.selection_map)
-			# In case the selection map is bigger than the canvas
-			selection_map_copy.crop(project.size.x, project.size.y)
+			var selection_map_copy := project.selection_map.return_cropped_copy(project.size)
 			for image in images:
 				image.blit_rect_mask(filler, selection_map_copy, rect, rect.position)
 		else:
diff --git a/src/UI/Canvas/Selection.gd b/src/UI/Canvas/Selection.gd
index 0b5683280..70c03af17 100644
--- a/src/UI/Canvas/Selection.gd
+++ b/src/UI/Canvas/Selection.gd
@@ -813,10 +813,7 @@ func delete(selected_cels := true) -> void:
 
 	if project.has_selection:
 		var blank := Image.create(project.size.x, project.size.y, false, Image.FORMAT_RGBA8)
-		var selection_map_copy := SelectionMap.new()
-		selection_map_copy.copy_from(project.selection_map)
-		# In case the selection map is bigger than the canvas
-		selection_map_copy.crop(project.size.x, project.size.y)
+		var selection_map_copy := project.selection_map.return_cropped_copy(project.size)
 		for image in images:
 			image.blit_rect_mask(
 				blank, selection_map_copy, big_bounding_rectangle, big_bounding_rectangle.position
@@ -885,8 +882,9 @@ func _get_preview_image() -> void:
 		original_preview_image = Image.create(
 			big_bounding_rectangle.size.x, big_bounding_rectangle.size.y, false, Image.FORMAT_RGBA8
 		)
+		var selection_map_copy := project.selection_map.return_cropped_copy(project.size)
 		original_preview_image.blit_rect_mask(
-			blended_image, project.selection_map, big_bounding_rectangle, Vector2i.ZERO
+			blended_image, selection_map_copy, big_bounding_rectangle, Vector2i.ZERO
 		)
 		if original_preview_image.is_invisible():
 			original_preview_image = Image.new()
@@ -919,5 +917,6 @@ func _get_selected_image(cel_image: Image) -> Image:
 	var image := Image.create(
 		big_bounding_rectangle.size.x, big_bounding_rectangle.size.y, false, Image.FORMAT_RGBA8
 	)
-	image.blit_rect_mask(cel_image, project.selection_map, big_bounding_rectangle, Vector2i.ZERO)
+	var selection_map_copy := project.selection_map.return_cropped_copy(project.size)
+	image.blit_rect_mask(cel_image, selection_map_copy, big_bounding_rectangle, Vector2i.ZERO)
 	return image