Adobe After Effects User Manual
Page 263
Facebook posts are not covered under the terms of Creative Commons.
Extent
If you notice image tearing near a Deform pin, use a Starch pin with a very small Amount value (less than 0.1) near the Deform pin. Small
Amount values are good for maintaining image integrity without introducing much rigidity.
How far from the Starch pin its influence extends. The influence ends abruptly; it does not decrease gradually with distance from the pin.
Extent is indicated visually by a pale fill in the affected parts of the mesh.
In addition to animating still images, you can use the Puppet effect on a layer with motion footage as its source. For example, you could distort the
contents of the entire composition frame to match the motion of an object within the frame. In this case, consider creating a mesh for the entire
layer, using the layer boundaries as the outline, and using the Puppet Starch tool around the edges to prevent the edges of the layer from
distorting.
Adobe also recommends
259