Please note that your cape must follow these requirements:
Your cape image must be at least 64x32 pixels.
Your cape image size can be a multiple of 2 (e.g. 128x64, 256x128), any other resolutions will not work.
Your cape image must be a PNG file to preserve transparency.
Several template cape images have been added as attachments, all of these templates will work with the mod.
How to make a cape work:
Download a cape image that follows the rules above.
Change your profile information and change the cape image.
Execute the /setcape website <username> command in-game or in earlier versions of minecraft use /setcape https://advancedcapes.nl/cape/<username>