I'm happy to say that after quite a long time of troubleshooting, I found that the cause of all the collision bugs and poor pathfinding performance was not the fault of the code. It was the model. SCP-106's model (at least the one with all the required animations) had a collision box that was far wider than HL2 doorways meaning he would get stuck on every doorway. So to remedy this, I have since switched over the model to the one from SCP: Containment Breach UNITY! Hooray! I have also improved his pathfinding and buffed his speed quite substantially (from 40 to 100). Unfortunately he can no longer have the cool spawn animation until I get some more animations for this model, dont worry though, the animations on this model work just fine. Expect some new juicy screenshots too!