[little_froy]

in L4D2 coop mode, when someone is invisible to you, that one will enable survivor glow for you.
how can I get a survivor is actual invisible to another survivor, or it means has someone's glow enabled for someone?

I tried L4D2_IsVisibleToPlayer in left4dhooks, it always return false when you are not alive. can't keep working when spectating someone.
Also tried trace, the problem is I can't perfectly simulate how the game does, always missing/extra entites in TraceEntityFilter.

[Marttt]

Engine does a lot of different algorithm checks is kinda hard to reproduce, what is your use case?

[Bacardi]

...client side thing ?