Control points in Viveza Efex is truly awesome. If you have ever wanted to know how to create a layer mask effect inside of Lightroom, this is the closest thing to it without going into Photoshop. The amount of control you receive when inside of Viveza is incredible.
Changes can be made to Brightness, Contrast, Saturation, Hue, Structure, Shadows and the Red, Green, and Blue channels.
You can also duplicate, group and ungroup control points for great effect, control, and organization.