2011

Table Of Contents
4 Under Reaction, select a plane (XY, XZ, or YZ) for the grid, adjust the size
of the grid and the distance between grid lines. The grid helps you place
elements in 3D space.
NOTE To work with grids, you must select the Interactivity option (under
Reaction).
5 Under Reaction, select a Highlight option for displaying objects:
Coverage: Display the pixels of selected layers that contribute to the
final composition. Adjust the transparency of the pixels by entering
a value in the Threshold field.
Object: Displays an object's geometry with a colored outline.
6 Under Reaction, select Interactivity to use the hardware renderer and
achieve dynamic results while you work. The results you see when working
with the hardware renderer may differ slightly from the results achieved
using the software renderer.
NOTE If you are planning to quickly composite a series of 2D layers without
manipulating or transforming layers or adding 3D effects, you do not need
to enable Interactivity.
NOTE To work with lights and cameras, you must also select Icons (under
Rendering) in the Render tab of the Reaction tool.
Adding a Reaction Tool and Setting the Composition
Background
When you perform multilayer compositing in Composite, you typically create
a new composition, then add a Reaction tool to start building from scratch.
However, you can also connect Reaction to any composition or tool output
in an existing dependency graph in the Schematic view. This automatically
sets the background for the composition.
Adding a Reaction Tool and Setting the Composition Background | 245