* Open the screenshot with an image editor, e.g. GIMP
* Crop it so that it has a 4:3 ratio
* Scale it to 512x512 px (weird but standard)
* Save it as a JPG file (~90% quality)
* Put it in the same location as the bsp file, with the same name (see next chapter for packaging rules).
* Open the screenshot with an image editor, e.g. GIMP
* Crop it so that it has a 4:3 ratio
* Scale it to 512x512 px (weird but standard)
* Save it as a JPG file (~90% quality)
* Put it in the same location as the bsp file, with the same name (see next chapter for packaging rules).