Photo realistic, architectural shot, Canon EOS-R, hyper-realism, hyper detailed, dark old underground dungeon room, small square room with (steep and narrow:1.4) (wooden staircase)  leading to ground floor, (uneven granite stone walls), (uneven granite stone floor),  dark dimly lit, low flat ceiling, (one  small short skylight:1.4) under the basement ceiling, (single light source  dimly lighting the room), shadowy corners, sun rays.