I'd really appreciate a hand with this.
There's a big rectangular room around the center of the level, accessible from a set of double doors. It's got a couple hallways, each leading to two sets of doors facing one another. I have filled three of the rooms behind those doors with water and I'm pretty sure I need to fill the fourth and final room as well, but I can't figure out how to do it. I think I've hit every visible switch in the level.
The room I haven't filled is the one behind the southern-facing door in the hallway to the east. If I'm correct in assuming that I need to flood it, how can I do so? If not, how do I get past the friggin' force field?
Please, please help me out. I've been going round and round those corridors for weeks!