Viewport: World Background - User Feedback - Blender Developer Talk
3d view - Is there any way to add backgrounds in Blender 2.8? - Blender Stack Exchange
How to set the background image for compositor in Blender 2.8 - Quora
Empty – Blender Knowledgebase
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 - Blender Developer Talk
rendering - How to set backround image in Blender 2.8 - Blender Stack Exchange
How to set a background image in Blender for modeling reference | Gachoki Studios
How to Render a Background Image in Blender 2.8 Using a Camera Background Image - Henry Egloff
How to Render a Background Image in Blender 2.8 Using a Camera Background Image - Henry Egloff