Recently, blogger and insider Tyler McVicker, who specializes in Valve, released new material about Half-Life 3. He reviewed the latest news from the dataminer community, who are looking for information about the "HLX" project.
For example, there is an expansion of the vehicle system; a new particle system (supposedly it was created specifically for HLX), which will be able to handle liquids; a friction system.
There was also a mention of a system that should handle cases when the player destroys some part of the enemy.
In addition, there are traces indicating work on optimization. For example, a system was introduced to record the time it takes to load any game element.
There are also specific optimizations for enemy AI files; and a system that determines the reaction of enemies to events.