I feel like there could be something very rewarding with this line of thought. Some physicists now believe that all the data about everything in the universe is encoded on a 2d hologram/dimension. en.wikipedia.org/wiki/Holographic_principle
It's interesting you posted that example with "Mirror Hologram."
Q said "Think Mirror"…"What is a map"…"What is a legend"…"What is a sequence?"
archive.4plebs.org/pol/thread/148777785/#148779656
I also think Q's statement "Look there, or [here], or there, truth is behind you." is possibly a big clue. It's the 17th line in that post, so maybe his 'look here' is pointing to an item #17 or post #17, like in the graphic attached to Q's post.
If the flag image is a code, we need to figure out if it is meant to be decoded on its own, like reading the position of hands on a clock?
Or used as input for something else, maybe like the Berlin Clock related to the Kryptos sculpture?
Or overlaid on top of something else Q has provided? Example attached is just to give an idea of the concept.