I’m especially curious in the case of fantasy settings. I’m admittedly not super well read in the genre, I know about the Ways from the Wheel of Time series[1] , and I’m sure D&D has its fair share of fast travel mechanics.

Anyway, in my case I use mass routers. Rather than a dry lore dump here’s a slightly less dry lore dump in story form!

spoiler

He glanced nadirward through the observation window at the green and blue surface of the planet. A river, coruscating in Focus’s rays, wound through the verdant jungle passing below. It was THE river, the measure to which all other rivers were compared. It was so old that it didn’t even have a name. Every other river on Yih, and every watercourse wrought on other celestial bodies by pioneers in the intervening millennia, was, after peeling away one hundred thousand years of sound changes and semantic drift, named after this river.

But he had seen this sight countless times, and it failed to put his mind at ease. He spun the metal prayer ring on his writing claw, feeling each of the twelve teeth pass under the pad of his outer thumb. The ring had belonged to one of his sires, who had often handed the shiny trinket to him to amuse himself with when he was barely a pup. It had been years since he had prayed it, not until this morning just before being shriven. It had been years since he was last shriven, too. He’d be the first to say he wasn’t the most pious Wayfarer, but there was a real possibility, however infinitesimal, that today his life would come to a messy end, and he wanted to have a clean conscience if it came to that.

He turned to face the cause of his anxiety. Attached to a bulkhead opposite the window was a cylindrical machine barely larger than a suspension capsule, with a bore just large enough to fit a single yinrih, and maybe a satchel if the yinrih in question was particularly svelte. He floated over and looked through the bore. It was like he was staring down the business end of a railgun.

«You’re going to be fine, Hearthfire.» He tried to reassure himself. «Nothing’s going to happen. We did gross upon gross of tests. Equator to pole, Low orbit to surface, surface to moon, even interplanetary hops, all the way from Hearthside to Moonlitter. Inert object tests, live tests, and all the tree-dwellers we sent came out perfect.»

«Except Moonbeam.» nagged a tiny voice in the back of his brain.

«Poor Moonbeam. I know you’re not supposed to name them. Makes it harder when… That happens.» The little tree-dweller went in fine, but the impulse buffer on the egress router failed as she dropped back into realspace on the surface, retaining all the momentum from the ingress router in orbit. In the span of a temporal quantum she ceased to be biology and turned into physics, ending up impacting the opposite wall at 20 times the speed of sound. The barrier was built to take it, but her poor body wasn’t. She ended up a maroon smear on the wall.

«Time to get strapped in.» said a sandy-furred engineer floating next to the mass router.

He took a deep breath and floated into the bore, slipping his forelegs into the harness, then his hind legs, then his tail, and finally his head.

A voice came through the earpiece around his left ear. «Hearthfire, this is Morningstar. Everything’s up and up down here.» It was the same cleric that had given him absolution this morning. «Just for review, you’re being routed through an intermediate router on the surface before egressing at the antipodes. The impulse buffer is good on both the intermediate and the egress, in case a packet gets dropped along the way.»

«Ingress and egress buffers are synced.» Said the sandy-furred engineer.

«Acolyte, begin the countdown. May The Light illuminate your way, Hearthfire.» Said Morningstar.

«Twelve…» The sandy-furred engineer began solemnly sounding off the numbers.

«Eleven…» In a matter of seconds, a thin sheath of realspace containing Hearthfire’s body would be shunted into the Underlay.

«Ten…» This realspace bubble would be encapsulated into billions of discrete packets.

«Nine…» From the perspective of a hypothetical observer embedded in the Underlay, these packets would appear discontiguous, and could take separate paths to reach the same destination.

«Eight…» But from the perspective of an observer contained within one of these packets, the entire space would still be contiguous.

«Seven…» Blood would still flow, and nerve impulses would still travel uninterrupted.

«Six…» Or they would if the traversal through the Underlay weren’t instantaneous.

«Five…» Hearthfire’s stream of consciousness would not be broken.

«Four…» There would be no ontological question that what emerged from the egress router was the same Hearthfire that entered the ingress router.

«Three…» These packets would hop instantaneously through an intermediate router directly below at the surface.

«Two…» This router would, in mere nanoseconds, direct the flow of packets to an egress router at the antipodes.

«One…» The egress router would absorb all the momentum that Hearthfire had while in orbit before shunting him back into realspace. Should the intermediate router drop a single packet, the whole flow containing Hearthfire’s mass would be shunted harmlessly back into realspace at that router, provided it, too, absorbed his momentum correctly.

«Zero.» Hearthfire felt a tingling sensation, as though his whole body had fallen asleep. The feeling lasted but a fraction of a second, then he felt the weight of his body pulling him down. He had made it. In less than the blink of an eye, he had gone from a space station in low orbit over Yih to a lab on the surface on the opposite side of the planet. Hearthfire was the first yinrih to traverse a mass router network, and he had done it without a hitch.

This was going to change everything.


  1. fun fact: the Ways inspired the Nether from Minecraft insofar as one step in one dimension is multiplied in the overworld ↩︎

  • Rhaxapopouetl@ttrpg.network
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    3 days ago

    In his book about writing sci-fi and fantasy, Orson Scott Card posits this is the first thing you should think about when mai ng your sci-fi setting: FTL (star wars) or Cryogenization (alien). This directly impacts how societies evolve: do you say goodbye to your loved ones when hopping on the starship, knowing you’ll never see them again, or can you zap from one side of the galaxy to the other and still be back for breakfast?

    • early_riser@lemmy.radioOP
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      3 days ago

      Interesting. Some relevant tidbits my story didn’t mention:

      The yinrih are capable of STL interstellar travel, but because they can’t lose consciousness without dying, they can’t resort to hypersleep. Instead, they use a technique called metabolic suspension which halts metabolism but uses Science™ to keep the brain and nervous system active. The device that does this is called a suspension capsule (referenced in the story above). The traveler is completely submerged in a fluid matrix called neurogel that acts as a non-invasive brain-computer interface, a liquid ventilation medium (for when your metabolism starts up again but your lungs are still paralyzed), and a shock absorbent.

      Since the person is still conscious but their sensory systems don’t work, the suspension capsule presents a simulacrum to the traveler in order to keep them from going insane due to lack of sensory input. It also speeds up their subjective time perception to make the trip pass more quickly. The problem with the simulacrum (sim for short) is that the more realistic it is, the more the person is tempted to dissociate, thinking the sim is reality and forgetting their life outside. In order to stave off this madness, Claravian missionaries (the only group to engage in interstellar travel) undertake a rigorous routine of prayer and meditation to keep their minds anchored in reality.

      I needn’t tell you that the ability to present an arbitrarily realistic simulation to a person is subject to flagrant abuse, and so-called gel-head parlors offer recreational suspension for a price. This abuse prompts Claravian research monasteries to start looking into safer modes of interstellar travel, which is what results in the invention of the mass router.

      As for the router itself, there are strict mass and volume limits to what can be sent through the underlay, meaning individual flows are limited to a single person and maybe a small carry-on. Because the mass router is discovered while a team of missionaries is living among humans on Earth, a mass router trunk is able to be established between Sol and Focus immediately. The missionaries construct a working mass router using their ship’s fabricator and materials found on Earth.