This 3D software tutorial shows you how to use the affect region modifier in 3ds Max. The Affect Region modifier is a 3D Studio Max surface modeling tool, primarily used with vertex sub-object selections while surface modeling. With Affect Region, transforming a selection of vertices can also transform vertices in the region that surrounds the selection. This can help you form a bubble or indentation in the surface of an object. The easiest way to see this modifier's effect is with a shallow, flat box object with plenty of subdivisions. The Affect Region modifier has a two-part, arrow-shaped gizmo plus numeric controls. See how to work with this simple 3ds Max tool in this tutorial.