I took an old photo of mine and reinvented it due to this contest.
I took the existing photo and heightened the values for the left side and used it for the red channel.
I repeated the process with an inverted image making the left side brighter than the right and used that for the blue channel.
In the green channel I used the blue one but with edits.
A few 10s of minutes later and a bunch of tweaking this was the result.
This is the Sheikh Zayed Grand Mosque In Abu Dhabi and the original photo is on my portfolio.