The 3D Cross Filter option first de

The 3D Cross Filter option first defines a spatial window in two dimensions using the parameters for 3D filters. However, the traces included in filter computation do not include all traces within the rectangle defined for 3D filter. It includes traces that have the same primary literal value or the same secondary literal value as the given trace, yielding a “cross” shape as shown in the figure. The cross filter is roughly equivalent to applying two 2D filters, one in the primary and one in the secondary direction. In some cases, a cross filter can yield benefits similar to a 3D filter at a much lower cost (compute time). Figure 2. 2D and 3D spatial filters