Prompt: Photorealistic, ray tracing, smooth MSAA 8X, underwater submarine is surrounded by a blue-green hue that reflects the light from the sun above. The submarine is huge, and its size is evident in the image. The detail is remarkable, with its many layers of hull and its many intricate parts. The submarine is painted in a dark blue color, with some white and grey accents. The details on the submarine are impressive, with its many windows, hatches, and antennae. The image also shows some of the submarine's weaponry, including torpedoes and missiles. The submarine is also equipped with a large number of sensors and communication systems. The image is a stunning example of the technology and power of the modern military submarine.