Do ground flares attract or give vision to Umbrella squads?
As with the flashlight, using ground flares does not allow Umbrella units to see you. Q: But the Umbrella squads keep coming after us. A: Umbrella squads have a wide communication network. Once you have been detected, other squads will be alerted to your location and will continue to hunt for you. If your camping spot is being overrun, you may find it advantageous to evade the Umbrella squads and seek out a new hiding place.
