Directional light shadow and deep shadow map

[wesley]

Since crowd scenes are often large in space, shadow from spotlight shadow map suffers from aliasing easily cause agents appear too small in the shadow map. Either supporting maya's focus or directional light shadowing will be great. Also, deep shadow map is highly desired.

[wesley]

hi, i've been trying rendering crowd for awhile, since miarmy let me output rib archive, much of the limitations are now overcomed.