I'm learning the hl2 any% novoidclip's run. In the same time i'm learning the entire run i'm practicing the red letter day skip, but the wall of the building with the elevator is invisible (actually i can only see it if i'm in a window of the building or if i'm very close to it). It wouldn't be an issue if i had not to enter the (invisible) window before going in the elevator.
So i'm wondering if it can be fixed and where it come from.
I precise that i'm using ghosting mod (maybe i did something bad in the installation) I think i did something wrong but i don't know what