Train Supply Manager Addon - adds procedurally generated icons for using the empty train concept. Depending on your modlist, this mod will generate suitable icons for added resources with either a cargo wagon or fluid wagon background and named empty X - where X is the resource name. Even vanilla games will receive numerous additional icons, as plates, sciences, and ammo are now supported with their empty train icons in addition to basic ores and fluids.
Currently supported mods:
Factorio Extended +
[Others will be continually added]
Thanks to Bilbo99 for the principal work on this one.