Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding General Error changing dialog portrait icon for NPCs

Extract the contents of icons.pak and move the folders from it to the data folder of Divinity Original Sin 2 fixes this... although it's a bug and does need to be fixed to read from the source files and patches in case they ever update the icon files.

[steaminstallpath]\SteamLibrary\steamapps\common\Divinity Original Sin 2\Data\Public\Shared\Assets\Textures\Icons\Ability_Skill_Status_Icons.dds

[steaminstallpath]\SteamLibrary\steamapps\common\Divinity Original Sin 2\Data\Public\Shared\Assets\Textures\Icons\Icons_DOS2_Books.dds

[steaminstallpath]\SteamLibrary\steamapps\common\Divinity Original Sin 2\Data\Public\Shared\Assets\Textures\Icons\Portrait_NPC_Icons.dds

etc. etc.