Can't remove collision

[amazingDeveloper]

I’ve made a model of corridor in blender. As always I added setting ‘Use complex collision as simple’, but with it I can’t move into the corridor like there is a box collider on the model. Can’t understand, where is the problem.

[ClockworkOcean]

Try looking at the mesh in collision mode

[amazingDeveloper]

Here how it looks like

[ClockworkOcean]

Is it just too small then?

[amazingDeveloper]

Yes, thanks)

[ClockworkOcean]

We all do it…