the way this works is simple: you see a picture that NASA or another individual has taking on the internet and you try to recreate that in space engine. it can also be a wallpaper if you wish but there are some costs to recreating the wallpapers.
It CAN'T be Advanced photoshopped. By advanced I mean:
Tools that crop out parts for editing in only spots.
special effects such as smoke, liquefying, reflections.
adding layers such as taking another picture online and inserting it.
It is appreciated that you do not do these things as that would be Cheating!
Here's a list of all the thing you CAN use for the image:
Light
Contrast
Exposure
Highlights
Shadows
Saturation
Tint
Warmth
Clarity
Vignette
Blur (if you have it)
These are all the things that are accepted in the image replication.
And Yes of course! pressing SHIFT-F2 on a body to edit its size, orbit, light, ect. Is allowed!
To give an example I will show you what I did in the image dump.
Mine
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Original
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That is all . if there are any questions I will try my best to answer!
Have fun!