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 Thanx to the guy who made the Alitalia logo and AirbusA330 for the original model! Note to the plane's author: It wasn't a too good idea to group the doors in one. It would be much better if you didn't group them at all, except if you were making a double interior. I don't know how to contact people {forgot}! Could you please re-mind me? I have something to tell you about :) .