3d studio max,c4d,fbx file:
1 locomotive, 1 wagon,1 Overpass linear,1 overpass curved adjustable.
In the 3dstudio max and c4d file,polygons can be increased and decreased with turbosmooth,hypernurbs.
In th fbx file the division is at the basic level, you must implement in your program the modifier division, ( in the objects group turbosmooth).
Only in the 3d studio max file all is parameterizable.
In the 3d studio max and c4d file, the module curve is adjustable in the curvature with bend.
Lighting is not included.
Coordinates mapping method used:
UVW Mapping projections.