Figure 4.27 - Boolean results

The Union option creates a new shape based on the merge of two

existing objects, and with the Intersect, you will get a new shape based

on the shared space between two 3D models.

4.6 Spin tool for rounded shapes

For the cases where you need parts of a model to have a perfectly

rounded shape, it will be hard to use only a combination of extrudes and

Subdivision Surfaces. In Blender, we have a tool called Spin that can

help to create perfectly rounded shapes. The Spin works like an extrude

that follows a circular path.

As a result, you get an arch shape for the selected object. Using the

Spin is easy if you follow a few rules to create each shape:

The Spin uses the 3D Cursor as the pivot point for the rotation and

arch center.