The galaxy S7 has a crappy camera, but I found the hidden "expert" mode, which helps quite a bit. I played around with the color tone settings for a while to get accurate colors, but the auto setting really murders the ISO and exposure. Adjusting those settings manually makes a world of difference. The camera is useless at night without doing this. I was playing around with a white point light source at night to get the chiaroscuro effect. I'm quite pleased with the results.