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... Narrow Gauge"...No. 4. SUPER LOW POLY... Size of model... less than 550 kbs.. Ideal for Low Memory Computers.. or Sidings Junk... Other Classes and Carriages will follow...