I remember that playing as Egypt with previous versions of Imperator it was possible, with the Serapis event, to switch the religion to Kemetic while staying Macedonian, to stay Hellenic Macedonian or to turn completely native (with the risk of a civil war). Now it is still possible to become Kemetic, but the Serapis event has been completely reworked in the mission tree and I'm not sure if it's still possible to switch culture. Does anyone know for sure if it's still possible to do that?