New 3D tree and bush for my current and next mods

Dear Assetto's racer, chiller,

I've finally find a way to make work the tree model converter of content manager, so now I will use my own 3d trees and bush for my mods, so those tree with now math with the 2d trees of my mods. I've also change the shader values of does 3d trees to my mith those of my mods.

Here some screenshot of those trees on Col de Fouchy.

PS : I've created a 3d model for pratically each 2d models, I've also lsighty put aside the 2d model to make the 3d model more visible.