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The original object is kept and the fragments are grouped under a → MultiBody. If you do not need them any longer the steering and the original object can be deleted.
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This option only works with a → MultiBody. When enabled RealFlow treats the MultiBody's individual objects as one object and you will see a propagating pattern.
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This value determines the ratio of the number of fragments in in areas with higher and lower fragment concentration. With smaller values the transition between these areas becomes sharper. An example:
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With this option it is possible to store the fragments of the zones with higher and lower concentration in two individual → “MultiBody” nodes.