Mazda 3 2020 Owner's Manual page 384

When Driving
i-ACTIVSENSE
Rear camera
1. Appears further than actual distance
2. Distance of obstruction being viewed on screen
3. Actual distance of obstruction from vehicle
4. Obstruction appearing on screen
5. Actual obstruction
6. Appears closer than actual distance
NOTE
If the vehicle is on a slope, obstructions taken by the camera can appear farther or
closer than the actual distance from the vehicle.
Three-dimensional object at vehicle front or rear
Because the vehicle front end guide lines (side camera) or the distance guide lines
(rear camera) are displayed based on a flat surface, the distance to the
three-dimensional object displayed on the screen is different from the actual
distance.
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