…or how to make a somewhat boring picture intersting?
Edit:
here comes the RAW:
20230917-1622-5944.cr3 (37,6 MB)
and a B/W render:
This file is licensed Creative Commons, By-Attribution, Share-Alike.
@Popanz I think you forgot to add the RAW file 
It’s a PlayRaw and a reverse-engineering exercise in one, since the output and the history stack are provided. Even better, it’s a space-efficient description of the raw file 
I’m getting old. 
I’m on the road at the moment. Will add the RAW later on.
Edit: Now uploaded in the start post.
From the raw …
GIMP: scale 1500, dup layer; luminosity mask, contrast; add mask; Alien Map; merge down; USM 12px.
Where does this strange green stuff on the ground come from?
GIMP’s Alien Map. I would analyze the origin but that is frowned on in this forum.
Are you sure? Isn’t this filter just mapping colours differently. I just tested it and I got VERY funny, psychadelic colours, just have a look below. But it never created structures which were not in the original picture.
Maybe do this on a separate layer and set layer property to value.
Solved. It was the afore-mentioned luminosity mask which allowed Alien Mapping on those parts of the ground in addition to the sky. I was trying to map just the clouds, unlike your wild example which did the whole image.
There are some features in your posted image that match the green bits.
Lot of fiddling with RT 5.11 
I rarely use retinex over the whole image, but hey this is PlayRaw!
Whatever is this a photo of? It looks like they have leveled off an area of a beach. And what are all the vehicles on the horizon doing?
Playing around seeing what does what. Looking forward to being more intentional about these edits.
Think I hit on Elon’s future Mars landscape in 20 years.
Gave it a try with my first preset (besides the Nametag)…an exposure mask, and then mucked about with the color calibration module before the color balance. A crop and then a trip through the Contrast EQ.
As well as all the usual button pushing in the hopes that something nice comes out.
