This 3D model was originally created with Sketchup 8 and then converted to all other 3D formats. Native format is .skp 3dsmax scene is 3ds Max 2016 version, rendered with Vray 3.00 Eco ...Railway...USA Standard Gauge"... SUPER LOW POLY... Size of model... less than 450 kbs.. including realistic shoes... rails split sleepers and ballast...