I am setting up a first-person-shooting scene, where I want to place a camera inside a pit on the ground.
Ideally, at a proper height from the pit bottom, the camera is expected to capture the pit wall in half of its view and outside world in the other half such that the camera peeks at the world from inside the pit.
However, I'm having a hard time achieving this, although I've physically placed the camera inside the pit.
By tuning focal length and near clipping (values of which are unconstrained and free to vary in my case), I get something like this
The pit appears in front of the camera.
How can I actually make the camera view be half pit wall and half the world, just as what our eyes see if we are squatting inside the pit?
My minimal working example Blender file: