Autodesk 62205-051408-9001 User Guide - Page 161

Working with 2D Composites ❚❘❘ Comparing 3D and 2D Options 2D composites have fewer options in the Composite Controls panel and Workspace panel than 3D composites. For example: • There is no camera in a 2D composite, and therefore no Camera controls in the Composite Controls panel. • There are no lights in a 2D composite, and therefore no Light controls in the Composite Controls panel. • There are no Surface controls in the Composite Controls panel. Instead, four of the 3D Surface controls-Opacity, Transfer Mode, Preserve Alpha, and Stencil Layer-appear in the Layer controls. • The Transform controls for layers and Null objects do not include axes for 3D. Specifically, you cannot set Z Position, X Rotation, Y Rotation, Z Scale, Z Shear, and Z Pivot in 2D space. • In the Settings controls, the options in the Quality and Render Effects groups are removed. 2D composites also have fewer options in the Toolbar than 3D composites. For example: • In the View list, the only two views for a viewport are Layer view and Composite view. • The five transform tools (Arrow, Rotate, Scale, Shear, and Pivot) are constrained to the axes for 2D space. Since you cannot use the transform tools in Layer view, the following shortcuts apply to the 2D mode Composite view only. Procedures for transforming layers in 3D are found in Transforming Layers. There is no Z Position and Z Pivot. For the Arrow and Pivot tools, you change X and Y when you leftclick and drag, and only X when you right-click or ALT-click and drag in the Composite view. Z Rotation is the only Rotation axis, so no constraints are needed. For the Rotate tool, you change Z when you left-click and drag, right-click and drag, or ALT-click and drag. There is no Z Scale and Z Shear. For the Scale and Shear tools, you change X and Y when you left-click and drag, right-click and drag or ALT-click and drag. To compare these shortcuts with those for 3D space, see Tool Constraint Shortcuts. Switching 3D Composites to 2D Composites In part, 2D rendering is faster because most of the 3D settings are simply ignored. This explains why 2D and 3D composites can exist within the same workspace. When you switch a 3D composite to 2D mode, there are a few implications with respect to how the controls may already be set. Most of the settings are ignored, though. Here are a few examples of what is ignored: • Lights are ignored in 2D, so the settings for shading, shadows, and reflections made in 3D will not affect the 2D result. • Layer controls • Extra transforms such as X and Y Rotation • Four-Corner Shape • Hinge and Target are ignored; the layers snap back to their original positions and rotation values. Note the following changes that may affect the result: • You can use parenting in 2D mode; all layers are restricted to 2D transforms. • You can also use the Align options, but only with X and Y alignment. The Align Z button becomes unavailable in 2D mode. • You cannot target in 2D mode; the Target list becomes unavailable. 145