When shooting glasses, how to polish them to avoid shadows? What background cloth should I use? How to set up a SLR camera when shooting transparent white glasses?

Ok, use the soft box. If not, block the light with a piece of white dacron cloth. It is best to put a matte paper in front of the flash (it is sold in stationery stores, also called copy paper). As for how to support this paper, it is very simple. You can use any pole at home, plus hangers and clips to dry clothes. . This is just a simple studio, remember that it is best to use multiple such lights. Do you understand?