Deep-Space Nebula Ultrawide
FluxDeep-Space Nebula Ultrawide is a tested Flux Flux.1 dev prompt for wallpaper work. It runs at Flux Flux.1 dev · Aspect ratio 21:9 · Steps 28 · CFG scale 3.5, and ships below with the exact prompt text, usage notes, and 2 pasteable variations.
Last tested: July 2026 with Flux Flux.1 dev
Part of the Flux prompt library.
Prompt
vast deep-space nebula stretching across an ultrawide starfield, billowing clouds of teal and magenta interstellar gas, pinpoint stars, a dark dust lane cutting through the center, faint distant galaxies, astrophotography look with natural noise, deep black space at the frame edges
Settings
- Model
- Flux Flux.1 dev
- Aspect ratio
- 21:9
- Steps
- 28
- CFG scale
- 3.5
How to use this prompt
"Deep black space at the frame edges" is what makes this usable as a wallpaper — without it Flux floods the whole 21:9 strip with gas and desktop icons vanish into color noise. "Astrophotography look with natural noise" stops the low-cfg render from going plasticky and airbrushed. Keep the dark dust lane; it gives the eye an anchor across the ultrawide span. For a phone, generate at 9:16 with "a nebula column rising vertically, stars thinning toward the top" so the clock sits in clean starfield.
Variations to try
- Ember version — swap the teal and magenta gas for "amber and deep crimson" for a warmer, calmer desktop
- Focal version — add "small eclipsed planet silhouette just left of center" as an anchor clear of desktop icons
Explore collections
What to do next
For developers — copy this prompt as JSON
{
"title": "Deep-Space Nebula Ultrawide",
"prompt": "vast deep-space nebula stretching across an ultrawide starfield, billowing clouds of teal and magenta interstellar gas, pinpoint stars, a dark dust lane cutting through the center, faint distant galaxies, astrophotography look with natural noise, deep black space at the frame edges",
"model": "Flux",
"model_version": "Flux.1 dev",
"settings": {
"aspect_ratio": "21:9",
"steps": 28,
"cfg": 3.5
},
"style_tags": [
"space",
"cinematic"
],
"use_case_tags": [
"wallpaper"
],
"source_url": "https://promptkoi.com/prompts/flux/deep-space-nebula/"
}The whole library is available as an open JSON dataset · developer docs.
