This Spider-Man balloon wall is a copy. I was sent the photo from a Pinterest image & I’d be happy to link to whoever built it originally. Once I had the design I broke it down into grids of SDS panelling as below. Each panel took 2 people 15 minutes to build using a Nitrogen cylinder and a conwin sizer. As it’s a symmetrical image I only needed to map out half and build 2 of each panel.
We had an hour to install this so everything was built in advance.