I want to customize the chat bubble tail, by adding a border via custom image.
The issue, is that there seems to be no solution online that I can use.
I have searched everywhere, and have found no answer.
You can try making your own chat boxes by using BillboardGuis on Player.Chatted and disabling the default chat boxes in game.Chat.
Otherwise, there isn’t an easier alternative currently.
Be sure to apply the chat filter on them, though.