In traditional animation, keyframes are modeled and standard graphics pipeline is used to animate the scene. In this paper, we consider volume animation where the 3D world and its components are represented as a voxel model. The voxel model is annotated with hierarchical feature in-formation and thus facilitates easy volume editing. These annotations are based on regularized Minkowski operators used in constructing/sculpting the model. The Selective editing of volume models also becomes possible with these annotations. The pure voxel or volumetric approach used from start to finish has the advantage that extremely simple data structures and algorithms enable us to generate complex volume animations.