In the early days of seismic data analysis, much emphasis was placed on single trace, or 1D, processing. Eventually, we became accustomed to the idea of treating the data as a two-dimensional image and 2D processing became commonplace. Today, of course, with the advent of more and more 3D surveys, there is a requirement for 3D processing techniques. In this paper we discuss a particular 3D analysis tool, namely the FKK transform, and its applications.