How to shoot acrylic cosmetics with SLR?

Manual focusing, with small hard light and side light at the back, round soft light at the top, a few ev on the dark background, and bright background to enhance exposure. Just try it. Say what lens you are. If you are taking photos of goods, it is recommended to adjust the color scale later to increase exposure. It doesn't matter if the color is not good-looking, just fix it. The better the machine, the less "colored" it is, and even it looks gray, depending on the color matching.