For Modders:

You can add custom firm images for firm buildings in your mod by placing them in this folder.

For instance, if your mod introduces a new retail building called "Wand Shop" with the building code "WANDSHOP", 
you can include PNG images named WANDSHOP1.PNG, WANDSHOP2.PNG, and so on in this folder.

The game will display one of these images in the Wand Shop's firm detail view. Which image is shown depends on the
company that owns the firm. For example, WANDSHOP1.PNG might appear for Company A, while WANDSHOP2.PNG might appear for Company B.

