soft deformation, the point at which a deformation falls off to
zero. Defined in terms of a falloff radius.
- In Fluid Effects,
a region that gives shape to fluid substances, used for example
to keep a cloud within a certain shape or to define the rough shape
of an explosion. Specify a falloff region by painting it or using
a curve in a container. The edge of the falloff area is soft (because
there are no collisions), and there is no buildup of density in