im trying to decrease the length, not the amount of cars
#CAR
33 ; MotorCarMass
10 ; NumberOfMotorCars
37 ; TrailerCarMass
0 ; NumberOfTrailerCars
18.4404 ; LengthOfACar1 ; FrontCarIsAMotorCar
2.67 ; WidthOfACar
3.61 ; HeightOfACar
1.5 ; CenterOfGravityHeight
5 ; ExposedFrontalArea
1.6 ; UnexposedFrontalArea
change that part according to the meshbuilder for the length of the train on the b3d file (remember the length is absolute value so it doesn't matter if the value is positive or negative, since in the train.dat it has to be always positive)
you'll see something like this on the b3d file
;---------------
;Car's left side
;---------------
[MeshBuilder]
Vertex -0.50, 3.70, -0.03
Vertex -0.50, 3.70, -18.60
Vertex -1.37, 3.10, -18.60
Vertex -1.37, 3.10, -0.25
Vertex -1.37, 3.10, -0.25
Vertex -1.37, 3.10, -18.60
Vertex -1.47, 1.67, -18.60
Vertex -1.47, 1.67, -0.25
Vertex -1.47, 1.67, -0.25
Vertex -1.47, 1.67, -18.60
Vertex -1.44, 0.80, -18.60
Vertex -1.44, 0.80, -0.25
Vertex -1.20, 0.80, -0.25
Vertex -1.20, 0.80, -18.60
Vertex -1.20, 0.00, -18.60
Vertex -1.25, 0.00, -0.25
Face 0,1,2,3
Face 4,5,6,7
Face 8,9,10,11
Face 12,13,14,15
[Texture]
Load r160side1.bmp
Coordinates 0, 0, 0
Coordinates 1, 1, 0
Coordinates 2, 1, 0.125
Coordinates 3, 0, 0.125
Coordinates 4, 0, 0.125
Coordinates 5, 1, 0.125
Coordinates 6, 1, 0.55
Coordinates 7, 0, 0.55
Coordinates 8, 0, 0.551
Coordinates 9, 1, 0.551
Coordinates 10, 1, 0.78
Coordinates 11, 0, 0.78
Coordinates 12, 0, 0.781
Coordinates 13, 1, 0.781
Coordinates 14, 1, 1.0
Coordinates 15, 0, 1.0
Transparent 0, 0, 255
Now change this value to reflect the length as highlighted from the b3d file that you plan to use as an exterior. remember, it is in absolute value:
18.60 ; LengthOfACarincrease or decrease according to the b3d file.