There's a Corvette C8.R Championship Series in iRacing now, with live coverage on YouTube

While I don't find Lime Rock very interesting, and I'm just watching an HD livestream, I think the graphics in this are great. My biggest complaint is that, while the number of trees lining the circuit is impressive, each one looks flat. And I guess that extends to the grass just being a texture and not 3D. But the car models, track details, shadows and reflections all look great.