full seamless spherical hdri panorama 360 degrees angle view in interior of white mpty corridor with spiral staircase in

360 architecture away board building circular climb corridor curve degree door down empty entrance equidistant equirectangular estate flooring gallery hall hallway handrail hdr hdri high indoor inside interior nobody panorama panoramic photo projection real round seamless space spherical spiral stair staircase stairway stairwell swirl view wall white window