From BSMG:
"A recent update to the PC mods Noodle Extensions, Chroma, and CustomJSONData has opened up what's possible in Beat Saber, now giving mappers almost complete control on everything in their maps.
To showcase this, Total BS is happy to announce the first event of its kind: Extra Sensory (Thank you downycat for the great logo!)
Over the next 5 weeks, we will be releasing a new map every week, starting today. Each will use these mods in a unique way that you haven't seen before.
To kick things off, we have the next "installment" in the series of DOOM wall maps you have come to know, with At Doom's Gate by CyanSnow, https://beatsaver.com/beatmap/cb19
In order to be able to play anything released throughout this event, please make sure you have the latest version of all the required mods from Mod Assistant."