Here is the complete map that I have made for the first release of the Thirdwheel game, it's not representative of anywhere in particular, just a fun place to go.
It consist of nine challenging sections, which are shown in the screen grabs below, I left the terrain transparent to so it is easier to see more of the details.
Creating these sections was real fun and a good job too as this was a huge amount of work and I totally underestimated how long it would take me to complete them.
A lot of extra work was caused by the zoning system that I came up with which shuts down all of the collision detection except that which is in the immediate vicinity of the vehicle.
This has made a big difference to the performance of the game and things run a lot smoother now.
Also I have stuck to my guns and all the mud, grass, gravel and rock surfaces in the sections do have different coefficients of friction..........