Sadly, the depth of the backgrounds in xXx: The Return of Xander Cage aren’t very impressive, as there’s not much deep detail in the film’s picture.
However, the spatial reasoning mentioned above is pretty well defined, so that makes up for most of the depth the picture is lacking.
When conveying the depth of picture most films take for granted with their 3D variants, there’s two things that tend to be the greatest indicators: the depth in the backgrounds, and spatial reasoning between people and objects.