How to deal with the photo background with red background? The obstacles did not cast a shadow

1. If there is photographic light, put a lamp on the left and right in front of the figure, and the light intensity on both sides is equal, so there is no shadow.

2. If you shoot by yourself with natural light, you'd better face the light head-on, and avoid side light or backlight, so there will be no shadow.

3. Try to stay away from the background when shooting to avoid projecting obvious shadows on the background.

4. If the above methods can't be avoided, it's relatively simple. Import the photos into the computer, re-matting with ps and put on a red background.