How does AI work with HRE? I mean can AI controlled country like Venice or Poland join HRE if they can't, can I program some countries join HRE and how would I do that?
You open Europa Universalis III\decisions\HRE.txt and try to understand how the first decision works. If you want to allow all countries to join, you have to change this part:
Code:
[B]emperor = { ai = no }[/B] # Simply do not want to join player-controlled HRE
Code:
modifier = {
factor = 0
[B]num_of_cities = 5[/B]
}
If you only want specific nations to join, the first entry should probably look like this:
Code:
[B]emperor = { ai = no }[/B] # Simply do not want to join player-controlled HRE
not = {
tag = TAG
tag = TAG
tag = TAG
}