In the final dome level, I can’t use the dome vents to get on top of the dome once the lava moat appears. At the top of the vent there is a red armour suit. This doesn’t get picked up, and I can’t drop down onto the dome. It’s like there’s a glass wall. This is the same for both vents. Very frustrating. Eventually I tried the NOCLIP cheat (“IMFREE”) and this allowed me to drop onto the dome OK.