The two techniques for creating highly organic and realistic 3D sculptures are: Mesh-based geometry - This is created by an interconnected surface mesh made of polygons. These polygons are easy to push, pull, grab, or pinch. This technique makes editing at different levels of detail possible. A digital sculptor can add smaller polygons to fine details and larger polygons to other details. Voxel-based geometry - This technique has no polygons; volume is the primary element in a voxel-based 3D sculpting technique. In this technique, materials can be added or removed, allowing complete freedom to the 3D sculptor.