Update modifiers.md

Author: ArtifactForms

documentation/modifiers.md

@@ -22,6 +22,11 @@ public interface IMeshModifier {
 }
 ```
 
+**Key Point:** Returning a Modified Reference
+
+An aspect of the IMeshModifier interface is that the modify method returns a reference to the modified mesh.
+This allows for chaining multiple modifiers in a single operation.
+
 **Applying Modifications**
 
 You can apply modifications to a mesh in two primary ways: