Simply best modded content for Assetto since Shelby Cobra and Snoopie's Nurb. Laser scanned track from volunteer enthusiast rise the bar for any dev. Excellent work!
"This track is still work in progress so expect some bugs and lack of polish here and there."
Ha, polish. Geddit? ...sorry.
Anyway, try to make your track smaller, over 150 Megabytes seems a bit too excessive, even if the track itself is gorgeous.
Grass only visible with maximum details.
I corrected LOD
https://drive.google.com/open?id=0ByWxQ_-_4aokRV9tUzhqdHVlNlk (only tor_poznanl.kn5 file)
Should be better with the stability of FPS