Apple Shake 4 - Manual (Page 471)

Chapter 16 Compositing With Layer Nodes 471
Shadow Color
A color control that lets you define the color of the drop shadow.
opacity
Defines how transparent the drop shadow is. The slider’s range is from 0 to 1.
Select
The Select node, located in the Other Tool tab, allows you to select between multiple
inputs. This node can be useful when you want to switch between different types of
compositing logic over time, or when you have “doubles” that you want to insert. For
example, you can switch a bluescreen character with a CG replacement using the
Select node.
In the following simple example, you can specify whether the asteroid is in front or
behind the Earth by putting two different Over operations into Select and toggling
between the two operations.
Select has an infinite amount of potential inputs. Each node you connect to a Select
node is sequentially numbered, starting at 1, from left to right.
Parameters
This node displays the following control in the Parameters tab:
branch
Lets you select the numbered input you want to use as the output image.