3Ds Max - background Color
Background Image
Background setting is used to place any image in the background.
Step 1: Menu: Views -> viewport background ->configure viewport background image.
Figure 17
Or
Step 2: Click on Use Files radio button and click on files button.
Figure 18
Step 3: Select the image which you want
Figure 19
Step 4: Click on active view button.
Figure 20
After that Figure 21.