In the rendered image, shadows do not display for RPC content, such as people and trees. 
 
  Issue: This problem occurs when using the Autodesk Raytracer rendering engine, and not selecting the Cast Reflections type property. 
 
  Solution: For each RPC object that you would like to render a shadow: 
- Select the RPC object in the view, and in the Type Selector, click 
	 
 Edit Type. 
   
- In the Type Properties dialog, for Render Appearance Properties, click Edit. 
  
 
- Select Cast Reflections, and click OK twice. 
  
 
- Render the image again to see a shadow for the RPC object.