In reality, people's teeth will turn yellow because of cameras or practical reasons. So how to make bright white teeth?

Generally speaking, there are more yellow teeth. Then let me explain this situation.

From the color relationship, the complementary color of yellow is blue.

A yellowish thing, if you want to reduce it, you have to add blue. So, let's set the tone and add blue.

For example, this picture:

You can see that my sister's teeth are not white.

The first step is to select my sister's teeth in PS. You can use magnetic lock tools, quick selection tools and so on.

The second step, according to our idea, directly create a curve adjustment layer, directly find the blue color from the curve, then pull it up and add the blue color. We will see that the obvious yellow of teeth is getting less and less, and finally it becomes white. Similarly, you can also use the color coding tool to add blue to the blue channel.

To sum up, when encountering problems, don't try to solve them, but consider how to solve them fundamentally.

Rendering: