Apple Shake 4 - Manual (Page 480)

480 Chapter 17 Layered Photoshop Files and the MultiLayer Node
2 Shift-click the + sign input of the multi-input node.
All selected nodes are connected.
The Order in Which You Connect Nodes
Unlike the other layer nodes, the order in which you connect input images determines
the initial layer order of the resulting composite. The first input represents the
background layer, the second node is the next deepest, and so on, until you reach the
input furthest to the right, representing the foreground.
Layer Order in the MultiLayer Node
Each image that you connect to a MultiLayer node is represented by its own set of
controls and parameter subtree, located at the bottom of the Images tab.
New images are inserted from the bottom up. Unlike the other layering nodes in Shake,
layer ordering in the MultiLayer node is determined by that layer’s position in the layer
list—the background layer is the one at the bottom, and the foreground layer is the
one at the top. Layers that appear above other layers in the layers list appear in front in
the Viewer. This compositing order can be rearranged by rewiring the node in the Node
View, or by dragging the Reposition control in the layers list of the Parameters tab.
Reposition control