This field type is a nodes capsule, so you can use your own node setups to define how this field is calculated. After creating a Nodes Field, double-click its icon in the Object Manager to open it in the Node Editor, where you can automatically view the contents of the field capsule or begin creating nodes. You can download the scene below to get an idea about how it works.

A still image from an animation in which a Plain Effector acts on a MoGraph Cloner. The positions, scales, and colors of the clones are controlled by a Nodes Field.

The Scene Nodes Field works exactly like the other Field Objects within the scene; for example, it can be assigned to MoGraph Effectors or Deformers to control their area of influence or intensity.
Another exciting feature is the option to access other fields within the Nodes Field and incorporate them into your own calculation.

As is typical with nodes, the inputs are on the left (see 1 in the figure below) and the outputs are on the right (see 2), through which the results are then output to the Nodes Field.

A particularly common use is likely to be the Local Position input for calculating field values (see 3), which can be used to query the positions of points on a geometry or the positions of MoGraph clones. In combination with the Global Capsule Matrix (see 4), these positions can then be converted with a Transform Vector node (see 5) to the capsule’s local coordinate system. The field’s position then changes the area of influence, for example, on the clones.

In the example shown above, we have the system calculate the distances of the clones from the position of the Nodes Field and use these to compute sine values, which we then smooth using a Smooth Step node (see 6). We use the result to generate a gradient. Additionally, user-defined data values allow us to influence the calculation from outside the system. For example, a multiplier for the animation time can automatically animate the sine calculation. The results of the calculation are output as intensity (Value) and Color. Which of these is then used can be configured, for example, in the Plain Effector, which uses the field in our example.