The process of merging a surface involves selecting individual surfaces and combining them into a single surface in the tree that is treated as a single surface. When merging surfaces, you have the option of keeping the original surfaces in addition to the new merged surface, or deleting the original surfaces. In addition, you also have the option of hiding the original source surfaces if desired.
Another option to use the Sew Faces Together option. When selected, adjacent surface faces which lack tangency (they do not smoothly flow from one surface face to another) will be stitched together in accordance with the sewing tolerance. Sewing Tolerance defines the maximum normal deviation from one surface face to the next in which those adjacent surface faces will be stitched together if Sew Faces Together is enabled.
Dissecting surfaces is the inverse operation of merging. Given a merged surface containing two or more surface faces, dissecting that surface will extract the selected faces and separate them as unique surfaces in the tree. Dissecting a surface leaves the original surface intact—it will be hidden for you in the tree.
Dissection Selected Faces offers an alternative selection option. It allows particular surface faces to be extracted as apposed to all the face in a CAD model.
As an alternative to direct selection this option offers the ability to select a set of measured points and build the surfaces that directly correspond to the point to object projections.
In addition to the commands listed in the From Surfaces menu there is an additional option available in the right-click menu for the surface heading
This option provides a shortcut to accessing only the surface faces of interest from a larger CAD model. When selected it will:
Prompt the user to select CAD Faces graphically from any of the visible surfaces, and press enter when done.
When selection is complete a new surface will be created using a copy of the selected CAD faces in the working collection and hide all the other surfaces.
This function deforms an existing surface to fit measurements.