LIN

A Pointfile helps you find leaks in your map. A file with your map's name will be created in the VMF's location, using a .lin extension (e.g. my_map.lin).

This file is created only if your map contains leaks. When a map is no longer leaking, the file will be deleted next time VBSP runs.

To load this file into Hammer, open your map in hammer and then load the file by using the Map>Load Pointfile option, a red line will appear in the 3D main view port which will go from a random point in the void through the leak in your map to the nearest entity to the leak.