It all depends upon what you what you want to achieve. There are many ways to do the same, do as shown below:
- RENDERCROP followed by SAVEIMG
- RENDER followed by Save > Save A Copy
- RPREF - choose Procedure = Selected - RENDER - Make a selection - Save
In Paper space setup a view, set the viewport to Shadeplot = Rendered and
when you plot it will be rendered. Hope it was helpful.