search for: proposal3d

Hi, Does somebody know if there is some trick to betoken the starting points ("on the floor") of the vertical lines in scatterplot3d-plots. I'd prefer something like that one in the example here http://users.utu.fi/attenka/proposal3d.jpg If this is not possible, could this option be added? Sometimes it is not easy to distinguish objects behind the others and for instance in this example picture the case nr. 21 is important. Atte Tenkanen University of Turku, Finland