The Escapists' PC build has support for custom textures.
Finding Textures[ | ]
To find the Textures you would have to look in your game files
Steam[ | ]
On Steam, you can these textures can be found in the game's files under Data > images > custom.
The typical path for this folder with the textures is ...\SteamLibrary\steamapps\common\The Escapists\Data\images\custom.
Modifying Textures[ | ]
The custom textures are found in the custom folder as .gif files. Some unknown process is required to turn these files into acceptable PNG files.
It is advised that one uses image editors that support transparency, i.e. not MS Paint.