Deadfire filter? Lol, what is that? If you mean the watercolor portraits I do here then it's handwork for the most part. I make them as similar looking as a I can to the official watercolor portraits. But if you don't like them you can always take only the original portrait to use in dialogues and scripted interactions. They will stand out though, because all NPCs and companions use watercolor portraits in those instances.
Watercolor or whatever, they look like comics for 8 yo kids and that's compared to PoE 1 is terrible