Not all CAD parts are flat. In chapter 1 lesson 10, we take your designs to the next level by adding depth and complexity directly onto existing parts. You’ll learn how to sketch on a 3D surface and use the extrude tool to either add material with Join or remove material with Cut.

We’ll walk through creating robust sketches with proper constraints, then turn those sketches into features like pins and holes that bring your part to life. By the end, you’ll understand how to move beyond simple flat shapes and start designing more advanced 3D components.

What you’ll learn in this episode:

• How to sketch on part surfaces instead of origin planes
• The difference between Join and Cut operations in extrude
• Why robust, fully constrained sketches matter for reliable results
• How to add complexity and functionality to your CAD designs