6.3.4 Combining cubemap shadows with a shadow map
To get shadows complete with dynamic content, you must combine cubemap shadows with a traditional shadow map technique. This is more work but it is still worth it because you are only required to render dynamic objects to the shadow map.
The following figure shows the chess room with smooth shadows only:
Figure 6-31 Smooth shadows
The following figure shows the chess room with smooth shadows combined with
Figure 6-32 Smooth shadows combined with dynamic shadows