You're right. Because of the layering of 3D printing, you can create shapes and features that wouldn't be possible with casting, molding, or even 5-axis milling

You're right. Because of the layering of 3D printing, you can create shapes and features that wouldn't be possible with casting, molding, or even 5-axis milling machines. Complex undercuts, empty compartments/ hollow areas to cut weight down, and features similar to extrusion-based design can all be performed in conjunction in a single solid body.