Half-Life: Alyx – How to Make AI Nav Work with Bootleg Tools

This guide will show you how to get navigation working in Half-Life: Alyx.

Making AI Nav Work with Bootleg Tools

Step 1

Add the following line to your FGD for HL:A if it is absent:

• @include “markup_volumes.fgd” 

Step 2

In your gameinfo.gi, in the Hammer section, set NavMarkupEntity to func_nav_markup (replace func_hlvr_nav_markup with func_nav_markup)

Step 3

In Hammer, go to the Navigation tab and select “Create Walkable Seed”, draw out a small block, and hit Enter.

Step 4

Make sure NPCs are in your map, hit F9, and build the map!

End Result

The end result should look something like this: