FANTASTIC work, and I can tell you put HOURS into creating it. The "look and feel" is excellent, and I love your version of the "corkscrew," and the creativity behind some of the signage is great!
One thing I'd like to see is an Autumn skin for it, where the tree colors have changed (look for skins for the Nordschleife as an example).
However, I get that you want to create an "old" track, but you need to tone down the bumps some, maybe 1/2 to what they are. If I were scouting tracks for a race organization (like SCCA or LeMons here in the US), and I drove a real version of this track for them to evaluate it as a candidate for their series, I'd drive a couple of laps, then return to the owners and say "I LOVE this track... but no dice, as your track is in a state of decay and needs to be resurfaced. It's too dangerous to host an organized racing event."
We had a local track that had to be shut down last year as the surface was beginning to degrade and it was getting dangerous. The owners couldn't afford to resurface it--they sold it, and now condos are being built in it's place.
The surface of this course kinda reminds me of that track before it was closed. It's okay, but detracts from the experience for something like the MX-5, but it's just not suited for track and race cars with tighter suspensions and less weight.
It needs to have bumps, dips and surface features, but not feel like a washboard. I almost want to give it five stars right now, if it weren't for the "condition" of the track surface.
But again, your work is AWESOME, and of course it's up to you if you want to tone the surface down some.
