some shapes. It is possible to control the roundness based on the

distance between each edge of a mesh.

For instance, if you look at the model shown in Figure 4.14, you will see

that it use a large relative radius for the smoothed version.

Figure 4.14 - Radius difference

You can control the smoothness radius with the Loop cut tool. By adding

new edge loops close to the existing top edges, we can visually set the

radius length. For instance, if we add a new loop near the top with the

CTRL+R key and place it close to the upper edges (Figure 4.15).