These object: classnames
Land_vn_cliff_01
Land_vn_cliff_02
Land_vn_seacliff_01
Land_vn_seacliff_02
have collision only on bottom, and on other half of object(top) you can walk/shoot through
I think it's major problem because mapmaker turned these objects on side and there is many places(example ticket #T158482) where you can actually through rocks