It is a battle for us cyber challenged oldies to promote our ideas and concepts to prospective clients. Rendering has developed to such a level that it can overwhelm a project, but at the high end market, it is an expected component of a pitch. To achieve a high level of sophistication you need talented programmers and powerful computers. Follow the link to see an example of what is possible. It is a 98% rendered CGI animation, mind blowing in its realization.