Fantastic track. Lots of unpredictability throughout the lap, and that's a good thing. Sector 1 is quite the adventure, particularly Turn 2, where one or two small line differences can toss you off track limits and possibly into the wall. The Esses are very technical and working on them and their entry from T12 made a huge difference in laptime. It was entertaining to learn.
Performance/frametimes seemed good - no hitching or stuttering I could tell at sunset (PURE/CSP latest version), although I'm running at 1440p 100Hz on a high-end machine. Kerbs provide lots of feedback (and eat you alive, particularly in T18-19). I agree about the road mesh with the other reviewer who mentioned it - it feels very smooth and could be a tad grainier.
AI is really, really good for AC. Car to car only produced one or two retirements in a 20 lap race. They have good, predictable braking behavior and overtaking moves. They are a tad slow through the Thun hairpin - their exit isn't bad, but their minimum speeds are a bit too low through the apex. I'd say it's worth about 3 or 4 tenths a lap. That's it for AI fixes, I'd say. It's really excellent for a mod track.
Definitely worth a donation for. Looking forward to 1.0, and thanks again.
Tested with the URD BMW M4 DTM (2018) in a 16-car DTM field, at 100% AI/95% Aggression. Lead cars (and myself) lapping in the mid 1:41's.