Apple Motion 4 - Manual (Page 1391)

Examples of 2D Group and 3D Group Rasterization
The following examples show the effect of rasterization on the blend modes of 2D groups.
In both examples, the lone elephant image, which is the topmost group in the Layers
tab, overlaps a portion of the family of elephants image, which resides in a separate 2D
group in the Layers tab. And in both examples, the lone elephant group has its Blend
Mode parameter set to Vivid Light. In the nonrasterized left-hand example, the lone
elephant’s blend mode interacts with the pixels of the group underneath it (the family
of elephants). In the right-hand example, however, the topmost group is rasterized;
consequently, its Vivid Light blend mode no longer interacts with the pixels of the second
group.
No groups rasterized Topmost group rasterized
The next examples show the effect of rasterization on the intersection of 3D groups. In
the left-hand, nonrasterized example, two groups (Group A and Group B) containing
rectangle shapes intersect in 3D space. In the right-hand example, Group A has been
rasterized; consequently, Group A and Group B no longer intersect.
No groups rasterized Group A rasterized
Important: If a group’s Blend Mode is set to Pass Through and any of the group’s layers
have different Blend Modes applied, the layers are not rasterized.
1391 Appendix A About Rasterization