Grimrock

On level 3, how do I close the pit circled in red below? This is the pit past the "portals room."

Some things happen when pressure plates are pressed down.
Some things happen when pressure plates are not pressed down.

Yeah, that exact pit stumped me for a while when I first encountered it as well! The solution is very nearby, if helps.

Aye, the solution to pass that pit is close but opening that door behind it is done elsewhere.

Thanks -- I feel stupid overlooking the pit solution when it was practically in front of me!

To avoid overlooking while playing it is imperative that you need focus your mind towards it.