I'm creating a sheet metal part of which I'll need the unbended surface. It's a kind of T shape with a total of 6 bendings. As you can see in the image below, three surfaces of this sheet metal have to fit three surfaces of a parallelepiped shape.
But at this point, how I can create the last two side surfaces? With a "boundary blend"? If yes, then how I have to create the respective bendings?
(I marked in red the borders of one missing surface. The two blue lines are the link zones. The other missing surface is symmetrical.)