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Troubleshooting 823
Yo u m i g h t w a n t t o a l s o d e c r e a s e t h e s t r e n g t h
of gravity.
Trou bleshooti ng
Check also : Frequently Asked Questions (page
2–821)
General Troubleshooting
Analyzing the World
Whenever you get unexpec ted behavior f rom
reactor, it is advisable to perform a world analysis
to get a report of anything detected by reactor as
suspicious, unexpected, or prone to error in your
scene. For more information, see reactor Utilities
(page 2–813).
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Simula tion ta k es too long.
General tip:
• Before performing a CPU-intensive operation
such as Create Animation or Reduce Keys,
make sure you don’t have any object selected
in the scene. Having an object selected during
some calculations can force 3ds Max to evaluate
the selected object many times in order to
update its UI, slowing down the calculations.
If the scene is complex but contains
independentpartsthatdon’tinteractwith
each other, try adding the objects involved to
different collections and solvers and create
the animations independently for each subset,
enabling and disabling the collections and
solvers accordingly.
If you are using Soft B odies, Cloth, or Rope (page
2–777):
• Try to reduce the complexity of the mesh that
flows to the reactor modifier. For example, you
can apply a MeshSmooth modifier on top of
the reactor modifier to render a smooth surface
while simulating a simpler one.
•Forsoftbodieswithcomplexmeshes,using
FFD soft bodies (page 2–786) can offer better
results and decrease the computation time.
• Unless necessary, do not use the Avoid
Self-Intersections option, b ecause it increases
computation time and memory usage
significantly.
•Trytoreducethenumberofsubsteps (page
2–806) used in the simulation. Also try to
decrease the number of Internal Steps used by
the Cloth/Soft/Rope collect ion.
Note: Thesestepsalsoreducetheaccuracyofthe
simulation, and can therefore cause instability.
If you are using rigid bodies (page 2–716):
•Forbestresultswhenusingrigidbodiesonly,
set Utilities panel > reac tor > About rollout >
Choose Solver to Havok 3.