User Guide

CHAPTER 4

152

Managing Layers

Motion Blur slows previewing and rendering, but you can apply motion blur without

displaying it in the Composition window. Use the Enable Motion Blur button ( ) near

the top of the Timeline window to control whether layers that use motion blur affect

redraw and rendering. You can also enable motion blur for all compositions when you

render a movie. For more information, see “Changing render settings” on page 358.

To apply motion blur to a layer:

Select the layer or composition you want to blur in the Timeline window, and choose

Layer > Switches > Motion Blur.

You can also apply motion blur by clicking the Motion Blur switch to place a checkmark

for that layer.

Note: A checkmark by the Motion Blur command indicates that motion blurring is turned on

for the selected layer or composition. The checkmark also appears in the Motion Blur switch

( ) for that layer in the Timeline window.

Adjusting the shutter angle for motion blur

Adjust the intensity of motion blur by changing the shutter angle setting. The shutter angle

is measured in degrees, simulating the exposure allowed by a rotating shutter. If you are

not applying motion blur, shutter angle has no effect.

The shutter angle uses the footage frame rate to determine the simulated exposure. For

example, typing 90 degrees (12.5% of 720 degrees) for 24-fps footage creates an effective

exposure of

of a second (25% of

of a second). Typing 1 degree applies almost no

motion blur, and typing 720 degrees applies a high degree of blur. By default, the shutter

angle is set to 180 degrees.

To set the shutter angle and phase for motion blur:

1 Choose Composition > Composition Settings.

2 On the Advanced tab, type a value for Shutter Angle.

3 In Shutter Phase, type a number (up to 360) for when you want the shutter to open

relative to the frame start (optional) and click OK.

Note: You can also change the shutter angle for a composition in the Render Queue window.

See “Changing render settings” on page 358.

UG.book Page 152 Wednesday, February 21, 2001 12:05 PM