the hadal zone (trenches), underwater, deep ocean, intricate detailed, cinematic lighting, beautiful lighting, octane render 
the hadal zone (trenches), underwater, deep ocean, intricate detailed, cinematic lighting, beautiful lighting, octane render --q 2 --v 4 --s 250 --upbeta
the hadal zone (trenches)
underwater, deep ocean, intricate detailed, cinematic lighting, beautiful lighting, octane render
the entrance to a cave with a scuba diver in it
the entrance to an underwater cave
an underwater cave with a light shining through it
the entrance to a cave in the ocean