There’s a new flyout button in the toolbar of the Bevel Deformation dialog that provides three types of beveling: Normal, Adaptive Linear, and Adaptive Cubic.
Normal beveling is the 3DSMax 1.x form of beveling, in which the beveled shape remains parallel with the original, no matter what the crotch angle of the shape. Steep crotch angles combined with excessive bevel amounts results in overshoots at the crotch.
Adaptive beveling alters the length of the bevel shape based on the crotch angle. Linear adaptive alters the length-to-angle in a linear fashion while cubic alters it more on steep angles than on shallow angles, producing a subtly different effect. Both forms of adaptive beveling result in nonparallel beveled edges, and both forms are less likely to produce invalid bevels due to overshoots at the crotch.
To see the differences in the three types of beveling, loft a star shape along a straight path and apply a bevel. When you switch between the three types of beveling, you’ll see the difference in the bevel outline. Alter one of the radii of the star to examine the beveling with shallow and with sharp crotch angles.