hello,All.          I'm a novice to IDL, now i have a need to visualize the marine sub-bottom space, and i have these following data:        1.X,Y,Z coordinates value for the spots on the seafloor,        2.X,Y,Z coordinates value for the spots on the first and second sub-bottom layers under the seafloor,        3. X,Y,Z coordinates value for the vertex of a pipe buried under  the seabed        Who can tell me the process to set up the 3D model for this visulization in IDL7.0?I hope it can be described in details because i'm a stranger to IDL,Thanks. Regards. Alex 2009-04-27