DumpTruck is Physics3D.System:
    dump_truck is KomatsuHM400.Variants.LinearActuatorControl.IndividualWheelMotors with KomatsuHM400.States.TurnLeft:
        drivetrain:
            max_effort:  15e3
            min_effort: -15e3

    terrain is Terrain.Terrain:
        num_elements_x: 130
        num_elements_y: 30
        element_size: 1.0
        max_depth: 2.0
        material: Terrain.MaterialLibrary.gravel_1
        kinematics.local_transform.position.z: -0.8
