I haven't a clue about bones and all that sorry mate. I literally edited Dyanamic/Static on those logs I swear it was that simple.
One of the values changes it ridged to not-ridged.
All the new corrugated pieces and a new rock done now and in game view:
Due to the texture and angle the rock isn't showing the edges much, it's a flat slate that juts out at random levels.
![alt text](https://camo.nodebb.org/088338849ce660f7b487a674ab96deb2d8c980ce?url=https%3A%2F%2Fi.imgur.com%2Fn98WI71.jpg)
Slightly better angle on that rock showing the edges
![alt text](https://camo.nodebb.org/d99fe7cdfe87f2c90e04e316c95be8337886d93e?url=https%3A%2F%2Fi.imgur.com%2FbeMcSom.jpg)
Last pic for now, I'm done working haha. There's 4 more rocks, including a nice big boulder. Yes I'm aware the boulder looks like a Ferrero Rocher
I may change the texture.
![alt text](https://camo.nodebb.org/fd63fc432d49bc591b1542f6c310fa144257dcec?url=https%3A%2F%2Fi.imgur.com%2F0sm9N8c.jpg)
For 15/5/18:
I am working on making the corrugated metal sheets react dynamically to the vehicle weight and position. So if you drive on a certain spot, it will rock back and forth until contact with the ground is made, just like real life!