I have a 3D box that has been created by lofting two equal size rectangles (the ends) so that two opposing long sides are parallelograms, IE one end is up from the original world plane. How do I extend the length of the box, and still keep the angular relationship of the faces? Is this an extrude operation?
Is your lofted 3D box similar to what is shown in the first image? Is what you want similar to what is shown in the second image?
If so, set the Reference Point to the lower corner, then use Copy Entities / Linear Array
(the location will vary depending on your user interface; I have mine under the Edit
menu) to make as many copies as you need. Vertex snap to the corresponding corner on the upper face to get proper alignment.
After that, you can 3D Add the objects, then 3D Slice to get the desired new height.
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