Automatic Small Surface Removal

This auto clean command will attempt to remove small and narrow surfaces from the model by compositing them with neighboring surfaces. The user specifies a small curve size value. This value is used in two different ways. First, a small area is calculated as the small curve size squared. This value is used to compare against when looking for small surfaces. The small curve size is also used to identify surfaces that are narrower than the small curve size.

To remove small and narrow surfaces from the model

  1. On the Command Panel, click on Geometry and then Volume.
  2. Click on the Modify action button.
  3. Select Auto Clean from the drop-down menu.
  4. Enter in the appropriate values for Volume ID(s). This can also be done using the Pick Widget function.
  5. Enter in the appropriate value for Small Feature Threshold Size.
  6. Click Small Surfaces from the Select Auto Clean Method menu.
  7. Click Apply.

Auto_clean Volume <id_range> Small_surfaces Small_curve_size <val>


The cylindrical model has 2 small surfaces and a few narrow surfaces. The surfaces are composited to remove these.

Figure 1. Automatic small and narrow surface removal on a cylinder