Allright. Is now in SR repo.
Did some adjustments. The stunt pipe area is still there, just now as an optional part you can explore. Has different entrance, same exit, and I moved it closer to city.
I've improved performance, I got more FPS now at start place, is high and smooth.
One more thing: disable road columns whenever not needed or even visible (like here under city road). This matters for FPS.
I also rotated and varied suburban houses. They had same default rotation. We need to vary things so they don't look repetitive.
Added a bit of grass.
Made the asphalt behave like it (more grip and no dust).
Look almost didn't change: