Thanks Michael.
But the problem is of the very big file size, in any format, before getting anywhere close to a rendering situation.

In a real 3D situation the rope would have to be made longer, bent, twirled etc, etc, and, ---then---rendered!

It may be one of those too hard things. I have not actually seen a plaited rope anywhere before.

The sheets on a boat that are attached to all the sails----just think of the miles! of cordage!

Brian