diff --git a/src/Classes/Drawers.gd b/src/Classes/Drawers.gd
index ab22a44..58eea92 100644
--- a/src/Classes/Drawers.gd
+++ b/src/Classes/Drawers.gd
@@ -67,13 +67,17 @@ func set_pixel_perfect(value: bool) -> void:
 
 
 func set_pixel(image: Image, position: Vector2, color: Color) -> void:
-	var mirror_x = Global.current_project.x_max + Global.current_project.x_min - position.x - 1
-	var mirror_y = Global.current_project.y_max + Global.current_project.y_min - position.y - 1
+	var project : Project = Global.current_project
+
+	var mirror_x = project.size.x - project.x_symmetry_point - position.x
+	var mirror_y = project.size.y - project.y_symmetry_point - position.y
+	var mirror_x_inside : bool = mirror_x >= project.x_min and mirror_x <= project.x_max - 1
+	var mirror_y_inside : bool = mirror_y >= project.y_min and mirror_y <= project.y_max - 1
 
 	drawers[0].set_pixel(image, position, color, color_op)
-	if horizontal_mirror:
+	if horizontal_mirror and mirror_x_inside:
 		drawers[1].set_pixel(image, Vector2(mirror_x, position.y), color, color_op)
-		if vertical_mirror:
+		if vertical_mirror and mirror_y_inside:
 			drawers[2].set_pixel(image, Vector2(mirror_x, mirror_y), color, color_op)
-	if vertical_mirror:
+	if vertical_mirror and mirror_y_inside:
 		drawers[3].set_pixel(image, Vector2(position.x, mirror_y), color, color_op)
diff --git a/src/Classes/Project.gd b/src/Classes/Project.gd
index 71d6744..51faaad 100644
--- a/src/Classes/Project.gd
+++ b/src/Classes/Project.gd
@@ -16,6 +16,8 @@ var guides := [] # Array of Guides
 
 var brushes := [] # Array of Images
 
+var x_symmetry_point := -1
+var y_symmetry_point := -1
 var x_min := 0
 var x_max := 64
 var y_min := 0
diff --git a/src/Tools/Bucket.gd b/src/Tools/Bucket.gd
index 0591475..556655e 100644
--- a/src/Tools/Bucket.gd
+++ b/src/Tools/Bucket.gd
@@ -129,15 +129,17 @@ func fill_in_color(position : Vector2) -> void:
 
 func fill_in_area(position : Vector2) -> void:
 	var project : Project = Global.current_project
-	var mirror_x := project.x_max + project.x_min - position.x - 1
-	var mirror_y := project.y_max + project.y_min - position.y - 1
+	var mirror_x = project.size.x - project.x_symmetry_point - position.x
+	var mirror_y = project.size.y - project.y_symmetry_point - position.y
+	var mirror_x_inside : bool = mirror_x >= project.x_min and mirror_x <= project.x_max - 1
+	var mirror_y_inside : bool = mirror_y >= project.y_min and mirror_y <= project.y_max - 1
 
 	_flood_fill(position)
-	if tool_slot.horizontal_mirror:
+	if tool_slot.horizontal_mirror and mirror_x_inside:
 		_flood_fill(Vector2(mirror_x, position.y))
-		if tool_slot.vertical_mirror:
+		if tool_slot.vertical_mirror and mirror_y_inside:
 			_flood_fill(Vector2(mirror_x, mirror_y))
-	if tool_slot.vertical_mirror:
+	if tool_slot.vertical_mirror and mirror_y_inside:
 		_flood_fill(Vector2(position.x, mirror_y))
 
 
diff --git a/src/Tools/Draw.gd b/src/Tools/Draw.gd
index 106c070..c4db65b 100644
--- a/src/Tools/Draw.gd
+++ b/src/Tools/Draw.gd
@@ -268,15 +268,18 @@ func draw_tool_brush(position : Vector2) -> void:
 	var src_rect := Rect2(dst_rect.position - dst, dst_rect.size)
 	dst = dst_rect.position
 
-	var mirror_x = draw_rect.end.x + draw_rect.position.x - dst.x - src_rect.size.x
-	var mirror_y = draw_rect.end.y + draw_rect.position.y - dst.y - src_rect.size.y
+	var project : Project = Global.current_project
+	var mirror_x = project.size.x - (project.x_symmetry_point + 1) - dst.x - src_rect.size.x
+	var mirror_y = project.size.y - (project.y_symmetry_point + 1) - dst.y - src_rect.size.y
+	var mirror_x_inside : bool = mirror_x >= project.x_min and mirror_x <= project.x_max - 1
+	var mirror_y_inside : bool = mirror_y >= project.y_min and mirror_y <= project.y_max - 1
 
 	_draw_brush_image(_brush_image, src_rect, dst)
-	if tool_slot.horizontal_mirror:
+	if tool_slot.horizontal_mirror and mirror_x_inside:
 		_draw_brush_image(_mirror_brushes.x, _flip_rect(src_rect, size, true, false), Vector2(mirror_x, dst.y))
-		if tool_slot.vertical_mirror:
+		if tool_slot.vertical_mirror and mirror_y_inside:
 			_draw_brush_image(_mirror_brushes.xy, _flip_rect(src_rect, size, true, true), Vector2(mirror_x, mirror_y))
-	if tool_slot.vertical_mirror:
+	if tool_slot.vertical_mirror and mirror_x_inside:
 		_draw_brush_image(_mirror_brushes.y, _flip_rect(src_rect, size, false, true), Vector2(dst.x, mirror_y))