The add-on enables users to customize their piece sets sets through:
Filling in URLs;
Uploading image files;
Uploading a folder of images (the add-on will read the names of the images and automatically assign them to their correspond pieces).
Naming
When uploading a folder. The file name of an image must contain both the color and piece type. One-letter abbreviations are allowed but when using abbreviations for both color and piece type, they should be written as one word. Words are split by space( ), underscore(_), short dash(-) or dot(.). Take white bishop for example, the followings are all legal names:
