In the end you decided to reveal something of your work flow, thank you.. ;)

But with blender I get nice result without any other software..
Below a first test with z-depth shader, there are a node to generate a good normal map useful for your method.

https://blenderartists.org/t/camera-based-normal-material-cycles/688450

and below the z-depth node for displacement..

https://blender.stackexchange.com/questions/38287/normalized-z-depth-shader-based-on-the-cycles-camera-data-node

Hi,

cool, but i no longer use Blender. Maybe i have to take a look at Blender again.

The area above the rear wheel looks to me distorted, or is the model also
at that place distorted?

Regards
Stefan