In my current game, Torian Culture next to Capital is 2.1 million.
In comparison, mine is 230k.

Based on the Timeline, there is a sharp increase in culture gain that hit a plateau in about 25 turns. This appears to be due to Stellar Nexus bonuses being double-counted.

In their culture tooltip, I see a "(2)" beside every Stellar Nexus they have.

They very well may have built two nexus as well, and the buff stacks between nexus. The megastructure are indeed very powerful! In such a case, I'd say your best course of action would be the declare war and conquer them before they swallow you up with their culture.

Alternatively, for your next game, you could use a mod that disable culture flipping of planets if it's something that really bothers you!

Also, if you'd like to share a save file of this occurrence, you could post it on the gc4 discord and we can take a look at it: https://discord.gg/galciv

They have 3 culture stellar nexus. Each gives 150 instead of 75. Unless this is due to a difficulty bonus for AI, should be a bug I think.

And there is no way for them to get to 2 million+ culture in less than 30 turns even if they filled a gigantic map with megastructures...

The difficultly levels do not buff the influence bonus though, so something else is causing this. As mention previously, if you could share a save file showcasing this, it would be most helpful.

Originally posted by Draver:

The difficultly levels do not buff the influence bonus though, so something else is causing this. As mention previously, if you could share a save file showcasing this, it would be most helpful.

Not in game ATM so cannot check but could that AI have Beacon of BOB?
Or some other influence enhancer such as a the trait that enhances?

I doubt it. That "(2)" after each nexus statement in the tooltip looks like a bug to me as well cause there shouldn't be two nexus around the same stars... I'd really like to see that save game mind yah.

Which channel in the Discord should I put the save game in?

Edit - Uploaded to "v2.96 Sitrep under supernova-feedback-and-sitreps"

That is the one thx

Thanks for posting it. My first though when opening the save is that you already won the game. That may be the sole reason why you'Re seeing strange stuff happening. Either way, it'll be forwarded to the Devs!

Thanks. I only noticed the influence issue about 10-20 turns before the save point.