PSA
My LoRA for Illustrious also works with Pony and may give better results. Try it out and decide which one you like more.
Update 0.2
It actually makes wallpaper composition now. Not always, but most of the time. Sometimes it will move character to the side in a nice way. Try experimenting with "simple background", "abstract background" and background colors. As a downside, sometimes this model will add Goku hair. Sorry about that (unless you are making wallpapers of Goku, then you're welcome).
Original
It was intended to generate some nice desktop wallpapers, and while it can improve quality on base Pony v6, you may not get good results with other models. It also sometimes tries to remove background. It's my first try, and I definitely made a mistake somewhere, not yet sure where exactly
Description
While adding trigger words is unnecessary, putting "wallpaper" in the prompt is advised. Additionally you may add intended keyword "wallpaper-kai".
Note that it was trained using default civitai parameters for Pony with dataset that definitely could be better, and I barely know what I was doing. So it is most likely not as good as you might hope.
It is recommended to put "signature", "watermark" and "logo" in negatives