3.3.1 Loop cut and Extrude Manifold

A powerful option introduced with Blender 2.9 is the Extrude Manifold

that can erase and split faces based on extrudes. It works better for

extrudes made to the interior of a model. You can see the real benefit of

such extrude mode when pairing it with a Loop cut.

To see the benefits of such extrude, we can take an example from a

simple cube that receives a horizontal segment with the Loop cut (Figure

3.13).

Figure 3.13 - Cube with single cut

In Figure 3.13, you can see a selected face where we apply both an

Extrude Region and Manifold. The results are shown in Figure 3.14.