You can save a rendering and then redisplay it later. Redisplaying is much faster than rendering again.
You can render directly to a file or save a temporary history entry to one of several different file formats.
Having saved your rendered image, you can redisplay that rendering at any time.
You can save copies of images that are part of a drawing’s render history.
You can use other Autodesk products to further enhance the quality of your models.
When you open drawings created with earlier versions of AutoCAD, content is converted to be usable in rendering.