How were they created?
For all these AI-generated images, I used Midjourney v4, with different prompts. For instance one like:
solitary figure in steampunk diving suite, looking up an impossibly large Lovecraftian monster with tentacles, in a giant underwater cave, glowing walls, eldritch horror, hyper-realistic
Then I used Topaz Gigapixel to get a higher resolution and to clean them up. After that, I finished them up in Photoshop with a few final tweaks.