Particle system supports 'Curves' for easy control over pointwise properties.
For example, make 'Color' a pointwise property and then enable curves for the color. All curves use particle's relative age (0.0 - 1.0) as input to define colors for particles. For example, the older the particle the dimmer its color.
Particles support new attribute
Channel. Any attribute, such as color or transparency,
can be used for determining now much particles gets emitted from
For example, setting
Color means that black areas of a surface
won't emit particles at all where as surface areas with white
color emit with maximum rate.
Filler features support
solid models. Particles are emitted only from areas which are
not trimmed out with boolean operations.
This option controls how much randomness is added over the position of the new particles to be created. If zero then particles gets emitted precisely from the surface of the emitter object.