Mukherjee,Jayanta, Kumar A., Das,P.P. and Chatterji,B.N. (1999):
Discrete shading algorithms for Three-Dimensional objects from Medial Axis
Transform, Pattern Recognition Letters, 20, 1533-1544.  Abstract. 
In this paper we present a discrete shading technique using Medial Sphere Representation (MSR)of 3D binary image data based on digital generalized octagonal distances. Our method is computationally attractive as it does not require the explicit computation of surface normals. We have compared our results with images rendered from voxel and octree reprentations while using analytical surface rendered images as bench marks. The quality of rendering by our method is certainly superior to those of obtained from voxel and octree representation. In addition, we show that our shading algorithm can be ported to a client-server environment, where through simulation we are able to demonstrate a speed-up of upto 4 using 8 to 10 processors.