This trick requires you to use the Woodwind airframe. You can switch airframes through the pause menu.

When you're in the main room in duskprism, the one with the flowers and cores, fly into the fog and die (the trick will be faster if you die opposite a flower because then it will spawn you near the flower). As soon as you die, brake by pulling the right analog stick back. When you spawn, you will be out of bounds. Easy! For the first pillar, the one with the big box-like machine, you can't skip everything, you still need to complete the room with the box. However, you do get to skip the other tunnels and the room with three switches, which is nice. For the second pillar, I'm still not entirely sure how much you can skip. I suspect you can skip the first 6 switches, then do the rest and exit the room. For the third pillar, Vega already found an OOB glitch, so you can choose whichever one you like (his is probably faster because you don't have to die)

i know you can skip the first 6 switches by squeezing through a gap in the door that drops down but i think it ony works with the piano

and for the box like room you can do it out of order wich plays all the cutscenes at once at the end but it is verry akward to do