Shooting my photograph in a mirror inside the Jaipur City Palace

The Jaipur City Palace showcases the history of the kingdom, the kings (in the case of Jaipur, there was a lot of interaction with the British during the British rule of India), and there are photos and paintings from that time. Next to such a painting, I tried taking a self-portrait in a mirror hung on the wall, and all I got was a general outline, with a flash framing most of the upper body and face.