I am trying to do this achievement.
I enter one of the jumping puzzles, start the beam pulsing, proceed to incrementally arrange the mirrors, then someone enters behind me and either disables the pulsing beam or disarranges one or more of the mirrors, seemingly just out of curiosity (and in ignorance that someone may be trying to do something with the relevant mechanisms). I have to start all over again. Part way through, the process repeats with someone new. Then I have to start all over again. This is even when I am doing this on a map that is in the process of closing. There are still enough people on the map to destroy my runs, repeatedly.
Hours into this circus, it has become a kind of water torture, or sleep deprivation.
Does anyone have any suggestions? Or am I just doomed to rinse/repeat this until I somehow "get lucky" and complete each one (there are 11 jumping puzzles for the achievement) before someone yanks it out from under me?
Any help appreciated.
Update: on top of that, I finally finished "Lighting the Hidden Tower", collected all 3 of the small chests, received credit for each of them... and then the main/large chest needed for the "Luminiferous" achievement did not spawn. So, I will have to wait for server reset, and try the "Hidden Tower" again.
Final update: first full run of "Hidden Tower" was bugged. Changed maps, let the server reset, did it all again (much more quickly, I had done each segment before), picked up each of the small chests, and the final big chest spawned.