ps how to turn the picture into a line drawing, the operation method is as follows.
1, first of all, use photoshop to open a material picture, press Ctrl + j to copy a layer.
2, and then select the layer 1 press Ctrl + Shift + U to remove color.
3, then press Ctrl + j to copy another layer, press Ctrl + i to adjust the picture to invert.
4, and then in the Layers panel under the picture mode adjusted to "Linear Lighten (Add)".
5, and then click "Filter" - "Other" - "Minimum".
6, finally open the Minimize panel, set the radius to about 2 pixels.
7, so you can turn the picture into a line drawing.