Corner Pins controls for the Shatter effect

Corner pinning is an alternative camera control system. Use it as an aid for compositing your layer into a scene. Adjust the following Corner Pins controls for the Shatter effect:

Upper Left Corner, Upper Right Corner, Lower Left Corner, Lower Right Corner

Specify the location of each of the four corners of your layer.

Auto Focal Length

Controls the perspective of the effect during the animation. When Auto Focal Length is off, the focal length you specify is used to find a camera position and orientation that positions the corners of the layer at the corner pins. If this isn't possible, the layer is replaced by its outline, drawn between the pins. When Auto Focal Length is on, the focal length required to match the corner points is used, if possible. If not, Focal Length interpolates the correct value from nearby frames.

Focal Length

Overrides the other settings if the results you've obtained aren't what you need. If you set Focal Length to something that doesn't correspond to what the focal length would be if the pins were actually in that configuration, the image may look odd (strangely sheared, for example). But if you know the focal length that you are trying to match, Focal Length is the easiest way to get correct results.