Most of the information here is for Warzone 3.1 and above.
.img files
These are text files that list images and their "point of origin" offsets:
- frontend.img – lists all images in the
frontend folder. - intfac.img – lists all images in the intfac folder.
The two numbers at the start of each line define the pixel offset to apply to the image when it's displayed on screen. This allows the position of the top-left corner of the image to be changed if required. For example, if you replace an existing image with a new image that has smaller or larger dimensions, you can use the offset to change where it appears so that it looks right on screen.
Burning oil resource images
The intfac_differentOil.img file defines the image sequence used to depict a burning oil resource on the radar mini map.
The cycle consists of 6 images (image_rad_burnres1.png → image_rad_burnres6.png) located in the intfac folder:
As you can see, the images are tiny and they are also different sizes.
File locations
The images bundled with the game can be found here:
base.wz or base
images
frontend.img
intfac_differentOil.img
intfac.img
warzone2100.png
frontend
<image files>
intfac
<image files>
If you want to customise the images in a mod, use the following structure:
<your mod>.wz or <your mod>
images
frontend.img
intfac_differentOil.img
intfac.img
warzone2100.png
frontend
<image files>
intfac
<image files>