Yep it seems pretty nice. Brno is one of my favourites as it was in a very old version of Racer many years ago.
I like the low density splines which should make the AI and AI learning work better than normal.
It's generally a really well made track too, FPS seem very reasonable and plenty of details etc... nice work and thanks for releasing
The constructive crits I'd give on what I see so far would be maybe the rubber wear in the corners could be extended onto the braking zone a bit?
If you can maybe swap the grass textures around the course for detail ones, add the grass detail into the detail map then paint in some shading and colour variation into properly UV unwrapped grass areas (like GTR2 did, check their textures for grass areas)... that would really be a nice feature to bring the grass alive too.
The tree shaders feel too bright to me, they look much better with ambient/diffuse = 1 and mipmapping = 1 (or remove the mipmap=0 line)
I'm nit picking really, as a beta this is very very nice and I can't wait to see where you go with it
Dave