2009

Achieving Particle Motion Blur
Particle motion blur is actually the result of varying the opacity and the length
of particles based on their speed. To accomplish this requires coordination
between material assignment and the settings in the particle systems. Follow
these instructions:
■ Use the
Particle MBlur map on page 5891 in the material that you assigned
to the particles. For best results, assign it as an opacity map.
■ Make sure that the particle system, PArray, PCloud, and Super Spray, or
Spray, supports the Particle MBlur map.
■ Choose Rotation and Collision rollout > Spin Axis Controls group >
Direction of Travel/Mblur option.
■ In this same group, set the Stretch spinner greater than 0 to stretch the
particles as a percent of their length based on the particle Speed setting.
■ Use the correct type of particle. MBlur works on all particle types except
Constant and Facing.
NOTE Instanced objects with multi/sub-object materials cannot be image
motion blurred.
Using Mapped Materials with Particle Systems
Mapped materials affect particles differently, depending on the source of the
material.
3010 | Chapter 14 Space Warps and Particle Systems