What is a 3d system and the difference between 2d object?In a 3d System, an object is being represented on a 3d plane having the three dimensions i.e. height, width and breadth/depth.means a 3d object has three transform co-odinates but a 2d object has only two dimensions i.e. height and width.What is a viewport and which is the default non-orthographic viewport?A viewport is the different camera projections through which any object is represented by default camera present in the software, There are 14 different viewports present in 3ds max.Only perspective viewport is the non-orthographic viewport.How many modeling techniques are there in 3ds...