What kind of command or plugin/extension could use to simply model that curved surface?
I have to start from a sqare, flat, plan and then, make a “convexity” shape (sorry for english word…).
The problem is that if i use only the pushpull, two of the 4 edge, doesn’t curve naturally to the edge… it’s bit difficult to explain what i mean… i know…
I agree with DaveR SSB is the right tool for pneumatic structures. Only use the rectangle shape to create the mesh, this means erase all the archs. After you have created the mesh add the required pressure to achieve the desired shape.
If you look more for tensil structure shape then use one of this plugins: SandBox tools (SketchUp ), Curviloft (by Fredo6), ExtrudeTools (by TIG),…following the archs you have drawn.