Hi TNO,
In my current project, I want the North Vietnamese AI to have engineer units but I don't want it to use them to build cities with.
If I understood the comments in this thread correctly, the AI will by default only settle grasslands or plains. If you want them to be able to settle other terrain types you can use the @Fertility feature by adding specific terrain types to the list. If you don't want specific terrain types to be settled simply don't add them to the list.
What if I don't want the AI to be able to settle on any terrain type, including grasslands or plains. Should I then add the two types to the @Fertility list and set their values to 0 (and not include any other terrain types in the list). Example:
@Fertility
Plains, 0,0,0
Grasslands, 0,0,0
Would such a set up in the rules.txt file prevent the AI from building any new cities on any terrain types?