Immersive Raids is a large overhaul of the Tarkov Raids with a large list of features and changes including
-Realtime Raid Progression: raids run in real time according to your local time, if its 8pm where you are, its 8pm in the raid, and raids last forever, along with this, the UI that shows the remaining time left in raid will now reflect your current local time instead.
-Dynamic Events: such as Blackouts, where the lights on the map all go out (except for labs as the lights are baked into the map but the doors are locked), leaving the raid seem even more dark and dead for 10 minutes, as well as disabling and locking power switches for 10 minutes, along with a Lockdown Event, where all extracts are disabled for 15 minutes, and an Airdrop and Armor Repair event, which are self-explanatory.
-Hourly Raid Cleanups: where every hour or so bodies are cleaned up to reduce processor strain and also run an airdrop along with the cleanup to reward you for sticking around.
-Decreased Energy and Hydro Decay: so you can last a little longer in raid. The UI may not update to reflect this, but its changed in the client
and more planned.