How do I add beveled border

Goal: add a bevelled border to counter for a "button-like" look.

Relevant reading:

• ImageMagick docs, “Raise or Sunk Borders”, https://www.imagemagick.org/Usage/transform/#raise

To add a bevelled border use -raise command:

      magick <input-file> -raise <width> <output-file>

example

magick input\input.png -raise 4 output\output.png

result

You may of course use -raise twice (or thrice, ...) for more pronounced effect:

      magick input\input.png -raise 4 -raise 4 output\output.png

result

Combination of plain and bevelled border results with a look that could probably work for most VASSAL modules if you are not for something more fancy:

      magick input\input.png -raise 4 -bordercolor #000000 -border 2 output\output.png

result