2009

changing its topology. While 3ds Max lets you animate the topology of objects
(e.g., change the number of vertices or faces over time), reactor can simulate
only objects with fixed numbers of vertices. If, during a simulation, reactor
detects a topology change, it ignores the object in question and reports the
problem as a warning.
Objects interpenetrate.
There can be different reasons for this:
■ Check that you haven't disabled collisions for those bodies. You can disable
collisions either
globally on page 4090 for pairs of objects, or for the object
in particular (
Rigid Body Properties on page 3911).
■ If the objects are attached using deformable constraints on page 4061, make
sure you haven't disabled collisions in the constraint parameters.
■ Make sure
Collision Tolerance on page 4088 is set to a value that makes sense
for the sizes of the objects.
■ Try increasing the number of
substeps on page 4085 in the simulation.
Cloth/Soft/Rope intersects itself.
Make sure you have turned on the Avoid Self-Intersections option in the
modifier on page 4024.
I can't add an object to a Cloth/Soft/Rope Collection.
Only an object that has the proper reactor modifier applied can be added to
one of these collections. Make sure you have applied a reactor
Cloth on page
4026,
Soft Body on page 4038, or Rope on page 4049 modifier to the object.
I can't add an object to a Rigid Body Collection.
If you are using
compound bodies on page 3920, make sure the group is open,
as only the group parent can be added to a
Rigid Body Collection on page
3922.
Mass and other properties are disabled.
Make sure you have selected only one object, and that this object is
geometrical. The most common cause for this is the use of groups. You can
use groups to create
compound rigid bodies on page 3920, but in order to change
Troubleshooting | 4119