The Motion Blur node

Blurring

The Motion Blur node

The Motion Blur node blurs its input image to simulate the blurring one would get using a live-action camera with a slow shutter speed. It is normally used to add "motion blur" to a character.

The blur's direction is automatically calculated from the motion of the image relative to the camera since the previous frame. The amount of the blur is set in its XSheet column as a percentage of the motion since the previous frame:

For example, if the input image has moved 2 00E since the previous frame, and the camera has moved 1.00W, then the image has moved a total of 3.00E relative to the camera. A Trail of 50% would therefore blur the image for 1.5 fields to the West:

You should note that:

The node takes no account of scaling or rotation.

The node blurs the entire image the same amount; it takes no account of the image's animation.

The node ignores any Transform-type nodes beneath its input.

The node does not correctly handle multiple paths to the Camera node where each path has a different transform; each path is blurred the same amount. You should instead use one Motion Blur node for each path to the Camera node.

Blurring

The Motion Blur node