First of all, of course, you should open the material picture above, and then select the pen tool on the toolbar to hook the characters' lips. Then in the upper right corner of the path panel, click the triangle arrow, select the storage path in the menu, and save the current path as path 1 for future use. \x0d\ Then create a new layer, fill it with gray, and then perform Filter-Noise-Add Noise, the number is about 4%, and other settings are the default! \x0d\\x0d\ Press CTRL+L again to open the color scale, so that the size and density of white in the layer are satisfactory. At this time, the white point may be a bit off color, but we don't have to worry about it, and then press CTRL+SHIFT+U to remove the color of the layer. \x0d\ \x0d\ Next, set the blending mode of this layer to linear thinning, go to the path panel and select the path 1, press CTRL+ENTER to convert the path into a selection, and press CTRL+ALT+D to feather two pixels; Then add a mask to the layer, and use a brush to treat the dark part of the character's mouth in the mask. \x0d\ Then use the mouse to select the background layer, click the "New Fill or Adjust Layer" button at the bottom of the layer panel, and select Create Curve Adjustment Layer to adjust the curve appropriately; Then, as in the previous step, the path is converted into a selection, feathered and smeared in the mask. \x0d\ Copy the background layer, pull the background copy layer to the top of all layers, and then perform the gradient mapping operation. \x0d\ Then set the blending mode of the copied layer to color filtering, and then perform the same steps as the first two layers, that is, transform the selection, feather and add a mask.