It’s kind of weird. Say one half of the screen is just grass, and the other half is a large (completely empty) building. When zoomed all the way out, if the building is visible, my FPS drops massively. But when it’s just the grass (or stuff like runways, stands, taxiways) it is perfectly fine.
There must be some optimization issue here, right? A flat, unchanging texture like an empty building shouldn’t be affecting the FPS that much. Perhaps it’s the lighting inside?
It’s because of what the game has to draw, if it’s only drawing grass it will run quicker but when it’s having to move all the people around in your terminal and vehicles it’s bound to be laggy!
move all the people around in your terminal and vehicles
The lag occurs on a newly created map, with a completely empty terminal. Nothing but grass/roads on one side, and an empty medium-sized building on the other.
What is your rig?
Laptop. The processor is an Intel i5-2450M at 2.50GHz. RAM is 16GB. Unfortunately, the graphics card is Intel HD integrated graphics.
Not the best computer, but it seems to work fine whenever the terminal building isn’t visible.
Processor is a bit low and the intergrated graphics isn’t great. If you put the settings lower? Like good instead of fantastic. Does that help?
I’ve tried it on both the “Simple” and “Fantastic” settings, with pretty much no noticeable difference between them. Darn.
Updated all drivers? DirectX version? Close all background crap? Smaller resolution? otherwise I don’t know and I’m afraid you’re in need of a hardware update.
Pretty sure that everything is up to date. I’m on DirectX 11, and CPU usage is at 1% without ACEO running, so it’s probably not background stuff. Smaller resolution didn’t fix it either.
It’s a very strange issue… like I said, totally empty map, runs perfectly fine, but one large (totally empty) terminal building kills the FPS.
Oh well. Thank you for the help, I appreciate it.
The Devs said their going to work on rendering the game better so the issue is not how good your hardware is but it’s how the game renders certain things like movement.
But an empty terminal has no movement…
Yeah but every time the scene refreshes it has to re-draw everything and if it’s too detailed then it takes a while (Basic idea behind LOD).
Even I am experiencing this lag. Even if there are no moving objects. The rendering method used by Devs seems outdated (No offence). 
Indeed - I experience lag as well.
And it does seem too be linked to the terminal.
But the game has only been out for 3 days, so I am sure the devs will improve it when they get a chance. 
I have no lag what so ever. Playing on fantastic with 49fps and no graphics card and 10+ chrome tabs with the forum and YouTube in them.
How big is your airport?
12 stands(5GA), 2 runways, 2 cargo bays, 2 reclaim area’s, 2 shops, 1 cafe. I’m on version 0.21.8
12 stands(5GA), 2 runways, 2 cargo bays, 2 reclaim area’s, 2 shops, 1 cafe.
I’m on 0.21.8
Forum is getting pretty slow atm. (upload of this screenshot took me more than a minute)
Someone on the subreddit confirmed that they also have this issue, so we know there’s at least two of us now 
https://www.reddit.com/r/airportceo/comments/73loxb/performance_discussion_thread/dnrbj0q/
They’ve got a Macbook while I have a Windows laptop, so it is unrelated to the OS. Both computers are relatively low-end though.
Eeh, you call that an airport?! 
