How to get the image with no distortion?
1- From file menu -> preferences -> appearance , set the fixed view with something that matches the image size for
example 1200 * 675 should work fine
2- From the toolbar (on lower side of screen, switch to
fixes view), as shown in the attached image
3- To get everything working
well you need to get good camera angle to make the 3D model and background
image match.