I just tested this segmented surface thing in the game and I actually really like it, perhaps at some spots I have reduced grip a bit too much outside, because it is not much different what line to take at those spots, but maybe thats how it really is. Some bends gets huge benefit from different line. Really interesting and really difficult, at some spots you have to get really close to the edge to get full advantage of grippier surface, it is rathe scarey there.
And yes thats just simply different levels of grip. Also the transitioning between those different levels feels rather natural for me, I have no problem. tested only 250gto, and gt40 so far.
I have assigned surfaces as normal road, rubbered, and "pure rubber" haha, friction coeficients - 0.82; 0.57; 0.45. I might have to do some tweaks, to make offline even more rewarding. But I'm very happy already.
@ltcars No I will probably not go for that, I don't know if I'd be able, also I guess too few people are interested in this anyway.....
Anyone would like to test ?