Here is an illustration of how to create a surface connecting your two objects.

1. Select the curve at the bottom of the upper object (1) and use Model>Extract Curve to make a new curve in the same position. I have moved it down so you can see what is going on but you can leave it where it is. (I have also added points to this curve to show that the number of points does not matter to the final surface)
2. Do the same for the curve at the top of the bottom object (2)
3. Join the curves with lines at (3) and (4). They should follow the curve of the joining surface you desire. It is easiest to do this in the 2d view so that the connecting lines are formed of vertecies that lie mostly in one plane. "Snap" the lines to a vertex in the curve by watching that the cursor changes when you are over a vertex.
4. Select Construct>Gordon Surface
   5 Select curve (1) then (2) and hit enter
5. Select line (3) then (4) and hit enter
6. Your surface should be created. If you have left the curves where you extracted them you should be able to weld the whole business together rather easily.

This is how I would do it, not to say there aren't other (better) ways!

Message edited on: 02/06/2006 17:20