I loaded into KORD airport at the terminal (default scenery). During the day time I have an FPS of 50+. I switched to night time where the terminal flood lights turn on (the orange lights illuminating the ground) drops my FPS to around 22 FPS. My specs are a GTX 1080 8gb, i5 9600K and 16gb RAM 1080p 144hz monitor, So I know it is not my system causing it. I asked a friend to test it as well with same specs that I have and he got no fps drop at KORD at the terminal. My settings are as followed
Visual Effects - "High (HDR)"
Texture Quality - "High"
Antialiasing - "4x SSAA+FXAA"
If I go to another major default airport such as KLAX, I have no FPS drops at night.
If any other information needed please ask.
Thank you for any input provided :)