Interpolated

Create a new control bar where you can define a new field as an interpolated field of an existing field. Using the interpolation you can either increase or reduce the number of grid points (for respectively a smoother picture, or for faster rendering).

The controls are simple: select the field to interpolate, select either linear or cubic interpolation, and select a interpolation factor. A factor of 2.0 means that in every direction you will get twice as many points, thus your grid will be 8 times as big. Similarly, specifying a factor of 0.5 will reduce the size of your grid by a factor of 8.