Unlike "Pan and Scan"—which crops the sides of a widescreen image to fit a square TV— reveals image data captured by the camera but intentionally masked for theaters. Godzilla was filmed using Super 35 (specifically common-top), a process that captures a much taller image than what is eventually shown on a 2.39:1 cinema screen. Why Fandom Prefers the Expanded View
Because these areas weren't meant to be seen, open matte versions can occasionally reveal production equipment, like boom mics or light stands, at the very edges of the frame. Godzilla 1998 Open Matte