Apple Motion 3 - Manual (Page 188)

188 Chapter 2 Creating and Managing Projects
The motion blur section has two parameters:
 Samples: The number of sub-frames rendered per frame, where 1 frame is 360
degrees. Higher Samples values result in a higher-quality motion blur effect, but are
more processor intensive. The default Samples value is 8. The maximum possible
value is 256.
The following image shows a shape that has been keyframed to move quickly across
the Canvas horizontally.
In the next image, Motion Blur is enabled and Samples is set to the default value of 8.
Note: When using larger Shutter Angle values, it may be necessary to increase the
Samples value to eliminate unwanted artifacts.
 Shutter Angle: Defines the size of the motion blur that appears for animated
objects. Increasing the shutter angle increases the number of frames over which the
shutter is open.
In the above image, the Shutter Angle is set to the default of 360 degrees, which
represents 1 frame. In the following image, Shutter Angle is set to 600 degrees.