So I have problems with the Astronomer's Visual Pack. When in the facility selector I get about 70 fps, however when I am in flight my frame rate drops to about 17. I am using a water cooled 1080ti and 3600x 32gb ram and playing at 2560x1440, and the temps are fine. Am I missing something, a setting or config, or does this pack play like crap regardless.
Edit:
I am playing with all of the required and suggested mods with the 8k texture pack.