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 Toy tractor with cart, solid wood. Original design PFritz http://sketchup.google.com/3dwarehouse/details?mid=236ada1da919b4e2391e4d6c585a697a I made no change in design, just particionei parts for better visualization of the assembly.