documentation/tutorial.md

@@ -133,6 +133,8 @@ For each component (Pole, Purlin, Rafter, Diagonal), you can define its shape an
   - For **Cylinder**: Use `Radius`.
   - **Length**: Defined by `Length` (e.g., `PoleLength`).
 
+  ![objectForms](uploads/structure/objectForms.png)
+
 #### Positioning and Spacing
 Key parameters control how the structure is placed: