Yes. That's something that was missing in Kingmaker and Wrath of the Righteous. There's a thread about it where we discussed our portraits. There are links to a few tools and mods, but you'll have to see if they still work with the current version:One thing that struck me during character creation is how few portraits the base game has, and I didn't like any of them. I assume most people import custom portraits?
Kingmaker - Purpleblob's Kingmaker/WotR portrait thread
I thought it would be nice to have a place where we can share custom portraits for Kingmaker/WotR :D Here are 5 of mine that I really love! My cleric/war priest/angel mythic: My empyreal sorceress/oracle/mystic theurge/azatas mythic: My arcane trickster/trickster mythic: My...
rpgwatch.com
The location of the custom portraits is here (you may have to create the directory):
%USERPROFILE%\AppData\LocalLow\Owlcat Games\Pathfinder Kingmaker\Portraits\
In that directory, you can create subdirectories 0001, 0002, … where you put each custom portrait (a set of 3 images).
You can use this tool to generate the required images. It lets you crop them from a larger image and resizes them if necessary:
NoTra.fr
NoTra.fr, portraits, Baldur's gate, baldur's gate enhanced Edition, Baldur's Gate EE, BG EE
www.notra.fr
For ex: