Apple Motion 3 - Manual (Page 793)

Chapter 9 Using the Replicator 793
Emission Alpha Cutoff (Image): When the Image Source object contains an alpha
channel, this slider defines the minimum opacity value that is necessary to create an
element at that point on the source image. For example, when set to 25%, elements
only appear at points where the alpha value of the image is equal to or greater than
25% opacity. The lower the Emission Alpha Cutoff value, the more cells appear. In order
for this parameter to be effective, the alpha channel needs to have areas of varying
transparency.
Points: Specifies the number of evenly distributed element points along the edge of
the shape. This parameter is available when the Arrangement is set to Outline or
Random Fill.
Offset: Adjusting this value moves the elements along the edge of the shape. This
parameter is available when the Arrangement is set to Outline.
Build Style: When the Arrangement is set to Outline, this parameter specifies the
direction in which the elements are placed along the edge of the shape. For the
Rectangle, Circle, and Image shapes, when Arrangement is set to Tile Fill and Origin is
set to Upper Left, Upper Right, Lower Left, or Lower Right, this parameter specifies how
the elements are built over the pattern. For the Box and Sphere shapes, when
Arrangement is set to Tile Fill and Origin is set to a corner (Front Upper Right, Front
Upper Left, Front Lower Left, Front Lower Right, Back Upper Left, Back Upper Right,
Back Lower Left, or Back Lower Right), this parameter specifies how the elements are
built over the pattern.
When Arrangement is set to Outline, the Build Style options are:
 Clockwise: Places the elements along the shape in a clockwise direction.
 Counter Clockwise: Places the elements along the shape in a counterclockwise
direction.
The following images show the difference between the Clockwise and Counter
Clockwise parameters, using a replicator that applies a gradient over its pattern
elements.
Shape with a feathered edge used
as Image Source Emission Alpha Cutoff set to 75% Emission Alpha Cutoff set to 30%