Thanks a lot for this - I am giving it a try today, will let you know how I get on…
The surfaces are not that complex - they were built with line curves using one of the surface commands, so I don’t see how it can be troublesome building a 6-sided shell.
Update: Ok, I tried it and I really appreciate the help you all have given me, and I managed to get the 4 main fillets around the sides of the Shell done, but fail when I try to the top and bottom fillets. To be honest, as an inventor/innovator, it’s very frustrating knowing exactly what I want to achieve and how I want it to look, but being held back for days by unwieldy/unreliable computer programs. I’ve uploaded the file and would really appreciate it if somebody could just do it for me please, as you all know a huge amount about Rhino, whereas I don’t have time to waste days trying to achieve this and getting nowhere. Willing to pay if necessary. I just need the top and bottom fillets being put in place, top fillet is 2.5 all around the top, bottom is 10 all around the bottom, and I would like the result to be trimmed/split please to look like a curvy 6-sided box.
Shellv1 002.3dm (1013.3 KB)