https://www.youtube.com/watch?v=SZcg2MITFZ8

Falloff in Modo is a way to deform gradually linear/radial with easing. It works with many tools and transformations.

You can select polygons. Select falloff and easing. Next you can move/scale/rotate or pick up any modeling tool. After that effect is propagated gradualy to all selected polygons according to selected falloff directions.