The origami rendering is like this, in fact, the principle uses the color block shadow gradient
First of all, adjust the background of the slideshow to look good, insert the font, the font should be set very large
Insert a color block with the same width as the text at the junction of the strokes of the text.
Set the color block to a gray gradient. The transparency of the section near the junction of the strokes is set lower, and the other end is set to 100% transparency.
Copy multiple color blocks, in the same way, add such gradient color blocks between other strokes.
With more shadow settings, this effect will appear. If it is not flat, you can select the color block, right click to edit the vertex, and move the color block shadow to make it more suitable