Trap and Gas color could represent how many kills the caustic, to represent how dangerous he's:
- Green: 0-50 kills.
- Yellow: 50-100 kills
- Orange : 100-200 kills
- Red : >200 kills.
So if you see Red toxic gas, you better watch out, since there's very dangerous Caustic around !!!!
How teammate differentiate gas/trap?
1. When introduce caustic, show his gas color during introduction (smoky background color).
2. During battle, His teammate can see team mate gas and gas trap on the map, so team mate knows where they're being deployed.
so if you see a gas/trap in front of you but it's not on the map, you know it's enemy gas/trap.