[NPCs] Invisible NPCs

Black Mesa Archive In-game Issues
#1

So, I played some Black Mesa today and found a rather strange bug.
I was running along the corridor of the with the snow area, and out comes a houndeye. I jump and manage to jump on top of him. He turns invisible.

So I do some testing and apparently some npcs do turn invisible when the player jumps on them. They act normally, you just can’t see them.

Tested so far:
Invisible:

  • Houndeyes
  • Headcrabs
  • Sentry Ceiling
    Non-invisible:
  • All humans
  • Bullsquid
  • Grunt
  • Alien Slave

This guy had somewhat of the same issue.
Random invisible models (enemies/npc)

#2

How did you even manage to get onto a ceiling turret? It’s, well, embedded in the ceiling!

#3

Oh, it’s for a map I’m creating, I’ve flipped it and parented it to a moving robot that uses it as its’ “head”.
The houndeye happened in a bms map and the rest I just tested with notarget and npc_create.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.