A method of compositing a plurality of ordered image layers which include a group of consecutive layers. The group has a shape effect and a composition effect. Any image layers under the group are composited to generate a first intermediate image. A first subset of the plurality of image layers is composited...http://www.google.com/patents/US7088375?utm_source=gb-gplus-sharePatent US7088375 - Grouping layers in composited image manipulation
