Originally Posted by Hassat Hunter
Pretty sure I see the button on your screens, it's on the wall where others show you the painting. Hard to see from above, you probably want to look sideways (it's far more obvious in screen 3 than the first 2).

Yep, I see it too.

[Linked Image]

Press the button and the trapdoor will appear. You don't have a picture on the wall anymore because you looted it BTW.