Although polygons have some disadvantages, they also have some compelling advantages. One of the main ones is that extra polys can be inserted into areas that require more detail. NURBS and splines, on the other hand, run throughout the mesh. When one inserts extra isoparms, these will appear from the beginning to the end of the mesh. In other words, if an isoparm is inserted at the eyelid, then this extra curve will flow all the way down to the base of the neck. If your software is capable of modeling with hierarchical b-splines (h-splines), then this will not be a problem. H-splines allow you to have one mesh with varying levels of detail in it. |