Controls how ProOptimizer treats object borders.
An edge is considered to be on the “border” of an object, when it is shared by no other face. Preserving borders can be important to preserving the appearance of a model.
Original model
Vertices: 557
(The default.) ProOptimizer protects faces with edges that are on the border of the object. However, a high optimization level can still cause border faces to be removed. If you are optimizing multiple connected objects, gaps might appear between them.
Protect Borders active
Vertex % = 50.0
Vertices: 557
Borders are preserved
Protect Borders active
Vertex % = 1.0
Vertices: 5
Decreasing Vertex % or Vertex Count can cause borders to become distorted.
ProOptimizer never removes faces with border edges. This reduces the number of faces you are able to remove from the model, but it ensures that gaps don’t appear when you optimize multiple connected objects.
Exclude Borders active
Vertex % = 10.0
Vertices: 65
At low Vertex % values, Exclude Borders can interfere with optimization.
Modify panel 