Apple Motion 4 - Manual (Page 621)

Modifying an emitter’s other transformation parameters (Rotation, Scale, Shear, and
Anchor Point) changes the distribution of particles from that emitter and transforms each
particle. For example, if you create an emitter, then modify its Shear parameter, the
distribution of the emitted particles changes to reflect the new plane of the emitter, and
the particles are sheared along the same plane.
Analog Modulator particle system preset After Shear effect is applied
Blending
Any changes you make to the opacity or blend mode parameters for an emitter are
applied to the particle system as a whole—the result of the emitter is blended into the
scene. For more information about blend modes, see
Using Blend Modes . For more
information about the Preserve Opacity setting, see Preserve Opacity Option .
Note: Within the emitter, the particles can be blended additively or normally (using the
Additive Blend checkbox).
Lighting
A 2D or 3D emitter can interact with lights in a 3D project. As with all layers, the Shading
pop-up menu (in the Lighting controls in the Properties tab of the Inspector) must be
set to On or Inherited for the lights to affect the particles. For more information on using
lights, see
Lighting .
Shadows
A 2D or 3D emitter can cast and receive shadows in a 3D project. If the 3D checkbox is
selected in the Emitter tab of the Inspector, Render Particles must be set to In Global 3D
(Better) for particles to cast shadows. For more information on using shadows, see
Shadows .
Reflections
A 2D or 3D emitter can cast reflections in a 3D project, but only a 2D emitter can receive
reflections. For more information on using reflections, see
Reflections .
Note: When the 3D checkbox in the Emitter tab of the Inspector is selected, the Reflections
parameter does not appear in the Properties tab.
621 Chapter 11 Working with Particles