Use a Detect Faces node () to partition geometric boundary entities of an imported mesh by searching for shapes in the mesh that are likely to constitute faces.

To add a Detect Faces node, right-click a 3D Mesh node and select Detect Faces from the Partition Entities submenu.

Select the geometric boundary entities that you want to split. Use All boundaries to select all boundary entities.

The partitioning algorithm splits the boundary elements along edges where the angle between neighboring boundary elements is large. Use the Maximum neighbor angle field to set the largest tolerated neighbor angle.

Select the Detect planar faces check box (selected by default) to also group approximately planar boundary elements into faces. Use the Minimum relative area field to limit how small these faces can be relative to all of the selected boundary entities. The maximum accepted angle between boundary elements in a planar face can be set with the Maximum deviation angle field. If the Detect adjacent fillet faces check box is selected, the algorithm also searches for adjacent groups of boundary elements that form cylindrical faces.