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5.5

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185Motion User Guide
• Filters are applied to a 2D group in local space—that is, flat to the image.
• When lights are used, the group is lit as a single object; nested layers and groups are
not lit individually.
Note: 2D groups not nested inside 3D groups are not affected by lights.
• Because it is flat, a 2D group has Drop Shadow, Four Corner, and Crop parameters in
the Properties Inspector.
• 2D groups can have a fixed resolution.
3D group properties
• Nested layers and groups are composited in depth order (according to their position
along the Z axis).
• When a 3D group is nested in a 2D group, the 3D group is flattened. This means that
the nested 3D group acts like a flat card and ignores the camera. In addition, the
flattened group does not intersect with layers of the 2D group or other groups in the
project.
• Filters are applied to a 3D group in view space. In other words, the filter affects the
group as if it were applied to the lens of the camera viewing the group.
• When lights are used on a 3D group, the group’s nested layers and groups are lit
individually.
• Only a 3D group with the Flatten parameter enabled has Crop, Drop Shadow, and Four
Corner parameters in the Properties Inspector.