StableDiffusion with this prompt:
"dark sci-fi UFO landing place in grim dark forest with alien visitors, demonic shrine, trending on artstation, by Jordan grimmer, huge scene, grass, art greg rutkowski"
The output is always different, so you can't imagine the amazing images that you can generate.
The generated images are all yours.
For a prompt example you can go to "lexica" web page.
I see, thank you for the info. I will definitely try it.