Autodromo di Casale Monferrato [Rfactor] WIP. Graphic update

Graphic update on the racetrack.
Changed texture of the grass and also the cross section.
Changed internal kerb.
More to follow.
casale05

Precedente New Xpack for Bob's Track Builder - Old school Box Construction Successivo Autodromo di Casale Monferrato [Rfactor] WIP - Building's first approach