Merge surfaces, delete area, divide and cut surfaces
Fusion has tools to work on surfaces, to merge different surfaces into a single surface, delete an area from a surface, divide or cut a surface.
Merge surfaces
The tool Merge surfaces is used to merge two different surfaces into a single surface.
Click Design 3D.
Click Merge surfaces.
The function opens a new panel on the right.
Merge operation: how the merging operation is performed in case of area in common between the two surfaces.
Replace with surface 2: replaces the area in common between the two surfaces with the content of the second surface.
Merge with minimum profile: merges the two surfaces by considering the minimum profile.
Merge with maximum profile: merges the two surfaces by considering the maximum profile.
Main surface: the main surface to merge.
Surface to merge: the surface to merge to the main surface.
Result surface: the surface subproject where the new surface is created.
Create vertical walls: if Replace with surface 2 is used, creates a vertical wall between the 2 surfaces.
Click Merge to complete the operation.
Delete area
The tool Delete area deletes the part of the surface that is internal to a selected polyline.
Click Design 3D.
Click Delete area.
The function opens a panel on the right.
Reference surface: the reference surface from where delete the area.
Select the polyline.
Specify if the delete area is internal or external.
Confirm to delete the area.
Cut surface
The tool Cut surface cuts the triangles of a surface along the selected polyline
Click Design 3D.
Click Cut.
The function opens a panel on the right.
Reference surface: the reference surface from where delete the area.
Select the polyline.
The surface is re-triangulated to have the triangles cut on the polyline.
Divide surfaces
The tool Divide surface is used to cut triangles along a selected polyline and create a new surface with separated triangles.
Click Design 3D.
Click Divide.
The function opens a new panel on the right.
Surface to divide: the surface subproject where we have the surface to divide.
New surface: the surface subproject where the new surface with separated triangles is created.
Select the cut polyline.

The surface is divided into two surfaces, along the polyline.