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I'm looking for an explanation for the presence of large geometric luminescent formations that are found to be embedded in the infrastructure of a city.

They must be esentially undetectable to the average human but show up clearly on special cameras (mid/far infrared or Thz gap). These formations could effect humans or their environment but only in ways that are hard for an average person to notice, or easy to attribute to other causes.

The best explanation would be the most linked to our current understanding of physics, but need not be the most probable.

When imaged they might appear something like this:

LED sculpture by Jun Ong Thanks a lot

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closed as primarily opinion-based by user535733, Cadence, JBH, StephenG, Renan May 5 at 4:48

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Advertisements by and for our insect overlords (whom I, for one, welcome). $\endgroup$ – user535733 May 5 at 0:44
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    $\begingroup$ Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. OK, I hate to say it, but this question is by definition primarily opinion-based because "coolest" is 100% subjective. Our help center explains that questions must be specific and answerable, must include context, must include restrictions/requirements, and should include research. $\endgroup$ – JBH May 5 at 1:02
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    $\begingroup$ However, off the record, I love the idea. Regrettably, this site is much less about creative writing than you might think. Our help center also states that "the goal of the site is to help you build your world, not to tell your story." $\endgroup$ – JBH May 5 at 1:04
  • $\begingroup$ Liam, it's bad form to edit a question to that extent without the OP's permission - and you didn't solve the problem. "Most plausible" is as vague and POB as "coolest." Please only edit for grammatical clarity unless given permission. Part of the goal is to help the OP learn how to ask questions. $\endgroup$ – JBH May 5 at 1:18
  • $\begingroup$ I’ve edited your question to try and make it less opinion based. Please add in a criteria for a best answer, i’ve gave the best one i can based on what was already in the answer but i don’t know what you are looking for. Also, try and avoid terms that are very opinion based. $\endgroup$ – Liam Morris May 5 at 1:19
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Interdimensional "map" markers

Those who can travel between dimensions of spacetime are leaving themselves indicators that help orient them to specific locations in worlds that diverge greatly from their origin world.

Using a system invisible to most human eyes helps the travelers remain unknowable while they travel, at least until a society is advanced enough to create technology that will detect the markers. Once the society can detect these patterns, it will be considered acceptable to interact with the humans of that world.

In the world in the picture, the differences are small enough that the markers remain within similar building sites rather than being out in an open area.

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