Their portraits (icons) in the game (Divinity: Original Sin 2)

Without further ADO go straight to the essence of the problem. I don't very like the original portraits for my character and companions in the game. In the old cult RPGs (Baldur's Gate, Icewind Dale, Arcanum, ToEE, NWN, etc.) if I didn't like for one reason or another standard character portraits, was the ability to set their own portraits. Even if you did not know what and how you need to do, to the rescue always came good rpg portraits. It even has instructions on how to install their portraits for the first part of Divinity: Original Sin. But unfortunately, the second part of the game like no instructions. In addition, I searched almost the whole Internet on this topic, but I haven't found. Probably I badly searched. Maybe someone knows a way to set their own portraits (icons) for this great game. Thank you in advance for advice and guidance.