How does ps make antique square carvings?

The square carving method of ancient ps is;

1, create a new white background file and a new layer;

2. Use the rectangle marquee tool (hold down the shift key) and "Edit-Stroke" to draw a square selection;

3. Type in the box, resize with ctrl+t, and rasterize the text;

4. Merge layers, "Filter-Sharpen" (multiple times);

5. Copy the layer, Filter-Noise-Add Noise, Image-Adjustment-Decolorization, click the icon with the magic wand tool to load it into the selection, and select Layer 1 Edit-Clear;

6. Use "Eraser Tool" to erase part of the edge in the appropriate position, and finish.