diff --git a/tutorial_raycasting.md b/tutorial_raycasting.md
index 36c3a00..4dc3ce4 100644
--- a/tutorial_raycasting.md
+++ b/tutorial_raycasting.md
@@ -73,6 +73,8 @@ The collision result dictionary, when something hit, has this format:
    shape:int # shape index of collider
    metadata:Variant() # metadata of collider
 }
+
+# in case of 3D, Vector3 is returned.
 ```
 
 ### Collision Exceptions