The Hex was made by Wanda involuntarily by her grief in the story. Her powers manifested an alternative reality in which she felt safe. On the other hand, in the show’s production, The Hex was entirely made by the VFX team. Demarco, the VFX supervisor, said that the Hex limit should be similar to the cathode rays of old TVs. They achieved this using layers of entangled lines and RGB distortion effects.