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 These dragons are from world of war craft. This is the frame model edition of these. If you thank any one for this, thank mandum, the person who created these WOW models.