This style of painting is quiet extraordinary, like a comic !
It gives less priority to the unique direction of lighting as usually required for normal flat painting, and the systematic dark lining of all surface gives an incredible accuracy and readability of the détails, even the tiniest !!
Christoph is the second (unless same painter) I've seen so far, the 'other' painting is painting flats from the secession and indian american wars.
The clear and faded colours also are providing a special ambiance to these paintings. They would well fit dioramas in black and white ...
Beautiful !!!