Visibility IV / V
The brightest night clouds were in the northeast, where the brightness of the belts was K=4, elsewhere the brightness was K=3 and dim gauze. I would estimate that the extent is about a quarter of the sky.
In the northeast, the bright belts were somehow thick and lumpy, but I can't say whether they would meet the hallmarks of an unusual shape. The color was a clear blue glow and pearly (picture 1).
Figure 2 taken with a mobile device, a wider area in the sky, from the north and northeast direction. Almost imperceptible to the naked eye, the gauze and dimmer bands continue high into the sky.
Photo 3 from my standard observation terrace facing northwest, it was really quite empty here. However, the picture clearly shows how to distinguish an illuminating night cloud from an ordinary unilluminated cloud: an illuminating night cloud is always pearly bright and blue-toned, ordinary clouds become either reddish or later dark. In this picture, you can see both beautifully next to each other.
I was also caught in the act itself, two dogs loudly told their owners that they had spotted me. However, after a small barking session, they really wanted a snack.