5

In the above example, the Blue A group is above the Red A group in the Layers list but
it appears behind the Red A group in the Canvas because it is depth-sorted. The same
principle applies to the Blue B group and the Red B group.
3D Transformations in 2D Groups
All objects have 3D transformations available, even when in 2D groups. Objects can be
rotated around any axis and moved along any axis. Objects in 2D groups are not
depth-sorted, and cannot intersect, regardless of their position in 3D space.
In the image below, groups A and B are positioned at the same point in 3D space. But
because they are layer-ordered, group A does not intersect with group B.
However, when you change the parent group to 3D, groups A and B intersect, as shown
in the image below.
Note: If two groups are coplanar (occupy the same plane), they are composited in layer
order, regardless of whether the objects’ parent is a 2D group or 3D group. In a 2D
composite, all objects are coplanar.
1241Chapter 21 3D Compositing