diff --git a/assets/map/bumper.png b/assets/map/bumper.png
index a86b67f2..63632844 100644
Binary files a/assets/map/bumper.png and b/assets/map/bumper.png differ
diff --git a/sources/Map/Map.cpp b/sources/Map/Map.cpp
index 5e8a9a2e..5bf045a5 100644
--- a/sources/Map/Map.cpp
+++ b/sources/Map/Map.cpp
@@ -75,7 +75,7 @@ namespace BBM
 			.addComponent<PositionComponent>(Vector3f((width + 1) / 2, 0, -1))
 			.addComponent<CollisionComponent>(
 				WAL::Callback<WAL::Entity &, const WAL::Entity &, CollisionComponent::CollidedAxis>(),
-				&MapGenerator::wallCollide, 0.25, .75)
+				&MapGenerator::wallCollide, Vector3f(-(width + 1) / 2 , 0.25, 0.25), Vector3f(width + 1, 2, 0.75))
 			.addComponent<Drawable3DComponent, RAY3D::Model>(unbreakableObj,
 			                                                 std::make_pair(MAP_DIFFUSE, unbreakablePnj),
 			                                                 RAY::Vector3(width + 3, 1, 1));
@@ -83,7 +83,7 @@ namespace BBM
 			.addComponent<PositionComponent>(Vector3f((width + 1) / 2, 0, height + 1))
 			.addComponent<CollisionComponent>(
 				WAL::Callback<WAL::Entity &, const WAL::Entity &, CollisionComponent::CollidedAxis>(),
-				&MapGenerator::wallCollide, 0.25, .75)
+				&MapGenerator::wallCollide, Vector3f(-(width + 1) / 2 , 0.25, 0.25), Vector3f(width + 1, 2, 0.75))
 			.addComponent<Drawable3DComponent, RAY3D::Model>(unbreakableObj,
 			                                                 std::make_pair(MAP_DIFFUSE, unbreakablePnj),
 			                                                 RAY::Vector3(width + 3, 1, 1));
@@ -91,7 +91,7 @@ namespace BBM
 			.addComponent<PositionComponent>(Vector3f(width + 1, 0, height / 2))
 			.addComponent<CollisionComponent>(
 				WAL::Callback<WAL::Entity &, const WAL::Entity &, CollisionComponent::CollidedAxis>(),
-				&MapGenerator::wallCollide, 0.25, .75)
+				&MapGenerator::wallCollide, Vector3f(0.25, 0.25, -(height + 1) / 2 ), Vector3f(0.75, 2, height + 1))
 			.addComponent<Drawable3DComponent, RAY3D::Model>(unbreakableObj,
 			                                                 std::make_pair(MAP_DIFFUSE, unbreakablePnj),
 			                                                 RAY::Vector3(1, 1, height + 1));
@@ -99,7 +99,7 @@ namespace BBM
 			.addComponent<PositionComponent>(Vector3f(-1, 0, height / 2))
 			.addComponent<CollisionComponent>(
 				WAL::Callback<WAL::Entity &, const WAL::Entity &, CollisionComponent::CollidedAxis>(),
-				&MapGenerator::wallCollide, 0.25, .75)
+				&MapGenerator::wallCollide, Vector3f(0.25, 0.25, -(height + 1) / 2 ), Vector3f(0.75, 2, height + 1))
 			.addComponent<Drawable3DComponent, RAY3D::Model>(unbreakableObj,
 			                                                 std::make_pair(MAP_DIFFUSE, unbreakablePnj),
 			                                                 RAY::Vector3(1, 1, height + 1));
@@ -273,10 +273,10 @@ namespace BBM
 				map[std::make_tuple(i, 1, 0)] = map[std::make_tuple(i, 0, 0)];
 				map[std::make_tuple(i, 0, 0)] = UPPERFLOOR;
 			}
-			map[std::make_tuple(0, 0, height - 1)] = STAIRS;
-			map[std::make_tuple(0, 0, 1)] = STAIRS;
-			map[std::make_tuple(width, 0, height - 1)] = STAIRS;
-			map[std::make_tuple(width, 0, 1)] = STAIRS;
+			map[std::make_tuple(0, -1, height - 1)] = BUMPER;
+			map[std::make_tuple(0, -1, 1)] = BUMPER;
+			map[std::make_tuple(width, -1, height - 1)] = BUMPER;
+			map[std::make_tuple(width, -1, 1)] = BUMPER;
 			map[std::make_tuple(width / 2, -1, height - 1)] = BUMPER;
 			map[std::make_tuple(width / 2, -1, 1)] = BUMPER;
 		}
@@ -289,10 +289,10 @@ namespace BBM
 					map[std::make_tuple(i, 0, j)] = UPPERFLOOR;
 				}
 			}
-			map[std::make_tuple(width / 2 - width / 8, 0, height / 2 + height / 4 + 1)] = STAIRS;
-			map[std::make_tuple(width / 2 + width / 8, 0, height / 2 - height / 4 - 1)] = STAIRS;
-			map[std::make_tuple(width / 2 - width / 4 - 1, 0, height / 2 - height / 8)] = STAIRS;
-			map[std::make_tuple(width / 2 + width / 4 + 1, 0, height / 2 + height / 8)] = STAIRS;
+			map[std::make_tuple(width / 2 - width / 8, -1, height / 2 + height / 4 + 1)] = BUMPER;
+			map[std::make_tuple(width / 2 + width / 8, -1, height / 2 - height / 4 - 1)] = BUMPER;
+			map[std::make_tuple(width / 2 - width / 4 - 1, -1, height / 2 - height / 8)] = BUMPER;
+			map[std::make_tuple(width / 2 + width / 4 + 1, -1, height / 2 + height / 8)] = BUMPER;
 		}
 		return map;
 	}