I want to cover the inside of the chair with 4cm thick upholstery foam in 4 sections, one side should be glued to the shell of the chair and the other face should be 4cm out. I want to keep the silhouette of the shell. from the side view.
I had a shot using forms but I can't control the 4cm depth. From the side view, I suspect there is a technique with thickening and offsets but I can't figure it out.
I've also attached a reference of a car seat, That boggled my mind and I can't understand how to model