Apple Motion 2 - Manual (Page 600)

600 Chapter 8 Working With Particles
Spin: A dial that animates particles in a system by initially spinning each individual
particle around its center. Adjustments to this control are in degrees per second. This
parameter is not available if the emitter contains more than one particle cell.
Spin Range: A dial that defines an amount of variance in the spin of generated
particles. A value of 0 results in no variance—all particles from the selected cell spin at
the same rate. A value greater than 0 introduces a variance defined by the Spin
parameter, plus or minus a random value falling within the Spin Range. This parameter
is not available if the emitter contains more than one particle cell.
Additive Blend: By default, particles are composited together using the “normal” blend
mode. Turn on this checkbox to composite all overlapping generated particles together
using the Additive blending mode. This occurs in addition to whichever compositing
method is already being used. The result is that the brightness of overlapping objects is
intensified. This only applies to the particle system itself—the blend mode of the
emitter determines how the result of the emitter is blended into the scene. This
parameter is not available if the emitter contains more than one particle cell.
Color Mode: A pop-up menu that determines if and how particles are tinted. This
parameter is not available if the emitter contains more than one particle cell. There are
five options:
Additive Blend off Additive Blend on
01112.book Page 600 Sunday, March 13, 2005 10:36 PM