I played around with Stable cascade for a little bit and this is what I came up with. Some pretty phone backgrounds.

Same as the title image

P: ornamental fractal mandala, calm morning, solarpunk, sunrise, 3 suns in the sky

Less gloomy

P: organic ornamental fractal mandala, calm morning, solarpunk, sunrise, 3 suns ((in the sky)), monumental

N: oval, elipse, dark, gloomy, blurry

More colorful

P: organic ornamental fractal mandala, calm morning, solarpunk, sunrise, 3 suns in the sky

N: oval, elipse, dark, gloomy, blurry

The other parameters are:

Sampler: k_euler_a

Model: Stable Cascade 1.0

Steps: 25

Guidance / cfg scale: 9

Height: 2048px

Width: 896px

Karras: true