Portal 2 doesn't use neither named landmarks nor changelevel triggers with explicit next map name.
Instead, being completely linear, it uses global ordered map list with each map having info_landmark_entry and info_landmark_exit entities to stitch consecutive maps.
Portal 2 doesn't use neither named landmarks nor changelevel triggers with explicit next map name. Instead, being completely linear, it uses global ordered map list with each map having
info_landmark_entryandinfo_landmark_exitentities to stitch consecutive maps.