1. A method for displaying attribute data values, wherein said attribute data values are derived based on a 3D volume, said method comprising: (a) extracting attribute data values corresponding to at least a portion of the volume of said 3D volume from an attribute data volume; (b) selecting at least a portion of the thus resulting extracted attribute data values to obtain selected data; (c) mapping said selected data on the surface of said 3D volume; and (d) producing an attribute map by displaying said 3D volume having said selected data mapped thereon.