Dont know what topic i would pick for this question so i just took one.
Ive been searching on the net how to make an entrance to an area only useable by 1 team, for example red team. Ive done this long ago back in q3 but dont remember how i did, i believe it was using some sort of trigger? … well i dont really know anymore. But if anyone know how to do this it would be great if you could share 
What im looking for: team 1 has a spawn, there is no door on this spawn but rather a ‘forcefield’ that will only let team 1 enter, if team 2 tries to enter it would be like running into a wall and they cant enter. Hope i explained well enough.
Maybe its using a common/cushion making it to allowteam 1? but then again its set to solid invisible wall right?