Hi Skwerm, it can be difficult to generate terrain in that way, since the contours tend to be of fairly different shapes and that can be difficult for Loft to handle well.

You could try the "loose" option in loft which will give a more relaxed result but you would probably be better off using the "Patch" command in Rhino for that type of surface-from-contours type thing.

Often times terrain is easier done in a polygon modeling program I think.

- Michael