Motion Blur Basics
Maya 2012 Tutorial
How to Add Blur to Moving Objects in Maya
Objects in motion appear blurred when captured by a camera. The length of the exposure and velocity of the object determine the amount of blur. For instance if you were to take a picture of a rotating airplane prop, it would be blurred, even with a fast shutter speed.
Add a cylinder primitive to the workspace (Create > Primitive > Cylinder) and lengthen the cylinder with the Scale Tool.
In the front view, select the cylinder. Set the timeline to frame one and press the s key to set a keyframe.
Move the timeline to frame 24. With the cylinder still selected, open the Channel Box and change the z rotation to 720. Press the Enter key + Esc key and then press s to set a keyframe. For a 24 fps animation, the cylinder is rotates two revolutions per second.
In the render options, check the motion blur option to activate (under the Maya Software tab > Motion Blur). Click the 3D button.
Render the sequence. For more information on rendering a movie, see topic Rendering a Movie.
Blur and Shutter Angle
Blur is determined by the object speed and the shutter angle (see camera options under Special Effects). Larger shutter angles produce more blur. The default is 144. The shutter angle is also related to the animation fps (frames per second). An angle of 360 would blur for 1/24th of a second in an animation running at 24 fps. For an angle of 90 the blur duration would be 90/360 x 1/24 = 1/96th of a second.
Playback Running Too Fast?
If you find that your preview playback speed is going to fast, open Maya > Preferences + Time Slider section. The Playback Speed should be set to Real Time.