How does Nikon's D90 bring out the feeling of portrait at night?

If it is a D90 set, there are no other accessories: gear A, maximum or reduced aperture by one gear, ISO800, face spotlight, turn on the top flash, flash index-1ev, Hou Lian synchronization. Try it and make adjustments. If the shutter speed is too slow and the background is blurred, you can improve the ISO, or consider using a tripod or other methods to stabilize the camera, such as placing the camera near lampposts and street trees. If the brightness of people and the environment is uneven, such as the face is bright and the background is too dark, continue to reduce the flash index. If the face is too dark and the background is very bright, increase the flash index. Color: Due to the different color temperatures of street lamps and flashlights, color distortion may be caused. Change the white balance, select the flash mode, or use the RAW(NEF) format and adjust it later. Of course, the JPG format can also be adjusted.