You can add custom images to the items in this mod by replacing them with other PNG type images.

There are two folder locations

C:\Program Files (x86)\Steam\steamapps\workshop\content\108600\2747736405\mods\VUP-Simulator Illustration Card\media\ui\content

This location is the folder with the original, high res images.
This is for items that are viewable by the map option.


C:\Program Files (x86)\Steam\steamapps\workshop\content\108600\2747736405\mods\VUP-Simulator Illustration Card\media\textures

This location is the folder with low res, small size images.
This is for items that are dropped on the floor.
Make sure to reduce the original image size to like 200x200, as 1200x1200 will cover a large portion of the map.

You can replace by renaming the items to VUPSimulator[Number].png for media\ui\content and Item_VUPSimulator[number].png for media\textures.

I am not certain for those 3d paintings, as I have not try changing those.
I imagine it is just replacing the center image of the wooden frame.
The location is in this file path.
C:\Program Files (x86)\Steam\steamapps\workshop\content\108600\2747736405\mods\VUP-Simulator Illustration Card\media\textures\WorldItems