Paint Reduce Weights works in conjunction with the feature to let you reduce the number of polygons in a mesh while attempting to retain the shape of the original. The Paint Reduce Weights Tool lets you paint on the mesh to specify a region on the mesh where you want the polygons to be reduced.
You do this by first selecting the polygon mesh, and then selecting Keep Original option and then click Reduce. You then paint on the original mesh and a copy of the mesh is reduced.
. Turn on the