What is a 3-D Accelerator? 

3-D Accelerator is no magic technology. It is merely an accelerator chip which has built-in ability to perform the mathematics and algorithms needed for 3-D image rendering andgeneration.  A 3-D imaging is merely an illusion, a projection of 3-D reality on a 2-D screen.  These are produced by projection and perspective effects, depth and lighting effects, transparency effects and techniques like as Ray-Tracing (Tracing the path of light rays emitting from a light source), Z-buffering (a buffer storing the Z-axis positions) and Double-Buffering (two buffers in place of one).