Each overlay_config.xml could be set to target the right map, so the correct overlay option would appear only for the specified map in the map changing menu.

The maps look great btw! Been intending to pimp the map view texture generation myself for a long while now too, would need a way to make it completely automated.

I tried this now and it shows up in the right map when selecting overlays, but when I load the map it still shows the vanilla one.

Thanks.
And yea, a better automated map "baker" would be neat.

The .psd files for this are set up so that I just need to change out the exported layers though. Almost everything here is done trough styles and adjustment layers. I think I could make a Photoshop action for it to automate it.
The obvious downside to this is that it requires Photoshop. Gimp gets so terribly confused when confronted with Photoshop styles, or at least it did last time I tried it.

Now if only there was a way to automate the layer exporting from Inkscape somehow...

In which subfolder under your overlay root folder did you add your modded map.png? It's only those specific folder names that get picked up for resource loading, which are factions, fonts, models, names, particles, sounds, textures, weapons, vehicles, items.

The RWR Inkscape extension shipped with the installer under tools-folder does some layer exporting, the terrain splat and height layers are exported separately, and it combines most of layers into that placeholder-y map view. I suppose it would be possible to adjust that to fit the exporting needs here.