A collection of user-specified points and polygons that can be placed into the animation hierarchy for manipulation by other objects, such as Paths, Sphereizers, Slanters, Twisters, Taperers, and Waveizers. As an example: if you wanted to "stretch" part of a face, you could create a new Subgroup object, assign the points and polygons you wanted to stretch to the Subgroup, and then make the Subgroup a child of a Transformer object.