According to configfiles.html it is <resourcetype>.cfg that holds the setting for regrowing resources.
Code:
Global
{
InitialUnits (long number of resource units world has to start)
[LandTile (int landtile ID)]...
[ObjType (int arttile ID)]...
}
Region (string regionname)
{
Range (x-west) (y-north) (x-east) (y-south)
UnitsPerArea (int resource units per tile)
SecondsPerRegrow (int seconds delay between regrows) *** This line
Capacity (int unit capacity for this region)
}
[Region...]
<resourcetype> would actually be the name of the resource you are referencing ie. clay.cfg, sand.cfg etc. These files are in the \pol\regions folder.
For example here is the entry I have in my clay.cfg file:
Code:
Region The Whole World
{
UnitsPerArea 10
SecondsPerRegrow 30
Capacity 10000
Range 0 0 5119 4095
}