This 3D model was originally created with Sketchup 6 and then converted to all other 3D formats. Native format is .skp 3dsmax scene is 3ds Max 2016 version, rendered with Vray 3.00 I didn't have the plans, just a model of it that I had made for school, and a 3D model. I couldn't export the whole model from the viewer, so I had to export 2D shapes and build it level by level. Way too much work...!!