2009

If it can be used as a deforming mesh, the cursor will change from an arrow
to a cross and you can select the object to add it to the collection.
Add Adds one or more objects from the scene to the collection. Click the
button to open the Select Deforming Meshes dialog. Highlight one or more
objects in the list, and then click the Select button to add the objects to the
collection.
Delete Removes objects from the collection. In the Deforming Meshes list,
select the bodies to remove from the collection and then click this button.
Disabled When on, the collection and the bodies it contains are not added
to the simulation.
Advanced rollout
Freeze When on, the deforming meshes in this collection do not follow their
animation during the simulation but instead remain static. This is useful, for
instance, if you want to drape clothes around a deforming-mesh-skinned
character in the
Preview window on page 4099 before using Update MAX - it's
much easier to dress a character that isn't still walking around!
Reset Default Values Resets the Freeze value to its default.
Constraining Deformable Bodies
reactor modifier (Cloth/Soft Body/Rope) > Constraints rollout
As with rigid bodies, you might want to constrain the possible movement of
your deformable bodies. For instance, you might want to fix cloth draperies
to a position in world space, or attach deformable clothing and hair to a
moveable character. However, because deformable bodies can change their
shape over the course of the simulation, you can't just specify attachment
points in the object's local space as you do with rigid bodies.
Constraining Deformable Bodies | 4061