An alternative method for using buildings:
trig 1 - active - loop on
cond - object selected <building>
eff 1 - change ownership <building> player x to player 1
eff 2 - activate trig 2
eff 3 - deactivate trig 1trig 2 - inactive - loop off
cond - object not visible <buliding>
eff 1 - change ownership <building> player 1 to player x
eff 2 - activate trig 1
eff 3 - deactivate trig 2With these triggers you can have use of the building as long as it is on screen. This may have RPG uses in having player controlled villager chop down trees to reveal path, or mine gold/stone for resources to trade etc...