Method:
Open a material photo with PS
Click - Image - Adjustment - Color Removal
After the color removal becomes black and white?
Make a copy of the layer background on the Layers page?
Click - Image - Adjustments - Invert
After inverting the color
Change the layer mode to -Line Fade? (After changing to Line Fade, the photo will become white)
Click Filter-Blur-Gaussian Blur (adjust the blur radius to 10-15)
The effect after Gaussian Blur
Click Image-Adjustment-Brightness Contrast (do a little bit of Brightness Contrast to save the picture)
The effect after saving the picture
The effect after saving
The effect after saving
The effect after saving
The effect after saving
The effect after saving
The effect after saving