Search Radius: the distance from a grid node to search for data. This value is used with the Radial Search algorithm.

Smoothing Iterations: The number of smoothing passes to apply to the grid. Smoothing passes apply a very short filter to the grid nodes that do not conform to the minimum curvature model. Typically, all secondary estimates are smoothed and primary estimates are not.

Average Distance: A distance within which multiple input values are averaged. This help to filter noisy data.

Fill Distance: The maximum distance from any point that a grid node is calculated. If necessary, computations continue beyond this point to reach a specified boundary.

Octants Needed: The minimum number of octants that must contain data in order for a grid point to be calculated. This is used for the Radial Search and Weighted Resampling algorithms. When using Minimum Curvature with a specified boundary, this parameter is effectively ignored.

Set Parameters for: Determine if the parameters will be applied All Grids (every grid on every tab) or Selected Grids. When you open the dialog box directly from a table cell, choosing Selected Grids will apply the changes to a single surface.

Reset: Restore the default settings.