Please add background image feature as in blender 2.79,in blender 2.8 we can't see the background image from front,top and side views - User Feedback - Developer Forum
Adding the background image to Blender - Blender 3D Printing by Example [Book]
rendering - Render scene where camera has background image (Blender 2.8) - Blender Stack Exchange
Transparent background option is under a heading named "Film" - Usability - Developer Forum