Not really in l4d2 there is a function that got added to
Code:
WitchLocomotion::IsAreaTraversable()
CDirector::AllowWitchesInCheckpoints()
l4d1 there is no AllowWitchesInCheckpoints this was added for l4d2 i don't play l4d1 if it were easy enough for me to add support for l4d1 i would.
If you want to do it for your self my guess would be to
Detour WitchLocomotion::IsAreaTraversable() and check if the survivor is in the safezone nav area and just Set the return to true.
Ill have a look into no promises
