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Let's create a basic falloff scenario with a simple rigid body dynamics scene. Here is the setup – the nodes can be added from the appropriate shelves:

• The ground node object is a → passive rigid body.
• Add a cube object and keep it selected,
• Open Tools shelf > Array Tool, enter a value of 15 for the horizontal (depends on your → axis setup) “Number of Items” parameters, and click on “OK”.

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After a few moments you will see a → MultiBody consisting of 225 cubes:

• Delete the original cube.
• Rescale the MultiBody with the R key and make it an → active rigid body under Node Params > Node > Dynamics.
• Change the MultiBody's' mass under Node Params > Rigid body > @ density > 200

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• A → “Gravity” daemon ties the cubes to the ground.

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• Attractor > Bounded > Yes
• Rescale the daemon's viewport gizmo with the R key and include all cubes.
• Attractor > Internal force > -200.0
• Make the force field visible under Display Force Field > Show field > Yes.
• All you can see is a green mess.
• Change this with Display Force Field > @ spacing magnitude scale > 0.005

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All arrows have exactly the same length, because the force is acting with the same strength at each point.:

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Activating the Falloff

Enable the daemon's falloff – all parameters located under Node Params > Force Field Falloff:

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Now, the arrows have different lengths and you can see two spheres (circles in 2D):

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• Inside the dashed sphere, the arrows are now not affected by the falloff.
• This means that here, the daemon's forces are acting with the adjusted “Internal strength” value.
• Towards the outer sphere the arrows become smaller and smaller, indicating the falloff.

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When you simulate you will recognize that the inner cubes are stronger affected than their counterparts near the daemon's boundary – this is the falloff's influence:

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The falloff creates different zones of attraction (only the MultiBody is visible here).

• Change the MultiBody's “@ density” if necessary.
• Play with “@ falloff percent” to change the size of the falloff zone.
• Set the “@ falloff decay type” to “Quadratic” and “Cubic” and simulate again to see the difference.
• The arrows show you immediately how the forces change with different settings.
• Simulate.