Simplify
Reduce the number of triangles in a mesh.
 On the ribbon, click the PolyNURBS tab.
 Click the Simplify tool.

Select a polymesh. Hold Ctrl or use box selection to
select multiple objects.

Choose from the following options:
 Weld Vertices: Automatically weld coincident vertices to clean up the mesh before performing the Simplify operation.
 Smooth: Enter a value from 0 to 180 degrees.
 The following reduction methods are available:
 Reduce by %: A lower value corresponds to a greater reduction.
 Reduce Faces: Define the final number of faces, which must be fewer than the number of input faces.
 Reduce Vertices: Define the final number of edges, which must be fewer than number of input edges.
 Click the Simplify button.
 Rightclick and mouse through the check mark to exit, or doublerightclick.