metadata borders are hard to do because the metadata varies from border to border. so i'll be explaining each image border metadata. plus leave metadata options that have worked for my borders. :D i rec htmlborders if you're looking for border image options. and i highly recommend recoloring them (using my "coloring graphics" page).
"CONTAINER_BORDER_IMAGE_SLICE"
slice essentially determines how many times a border is repeated / sliced in half. the lower the number to less times, left image shows a 20% slice, right shows 30%
"CONTAINER_BORDER_IMAGE_OUTSET"
how much the border is pushed out on the container, pretty self explanatory. the higher the number, the larger the space. left = 5px right 2px (look at the kaomoji space difference if you can't tell)
"CONTAINER_BORDER_IMAGE_WIDTH"
somewhat hard to differentiate from slice bc a smaller slice looks bigger. but width just makes the border bigger, no less repeats (left 7px, right 10px)
"CONTAINER_BORDER_IMAGE_REPEAT"
to be honest, still not sure what this does but "repeat" is your best option. "round" works too, either should work if one looks weird haha
Code to use — Obviously with "CONTAINER_BORDER_IMAGE = imageurl"
- CONTAINER_BORDER_IMAGE_SLICE = 20%
CONTAINER_BORDER_IMAGE_WIDTH = 8px
CONTAINER_BORDER_IMAGE_OUTSET = 1px
CONTAINER_BORDER_IMAGE_REPEAT = round - CONTAINER_BORDER_IMAGE_SLICE = 40%
CONTAINER_BORDER_IMAGE_WIDTH = 7px
CONTAINER_BORDER_IMAGE_OUTSET = 5px
CONTAINER_BORDER_IMAGE_REPEAT = round - CONTAINER_BORDER_IMAGE_SLICE = 30%
CONTAINER_BORDER_IMAGE_WIDTH = 7px
CONTAINER_BORDER_IMAGE_OUTSET = 5px
CONTAINER_BORDER_IMAGE_REPEAT = round
CONTAINER_BORDER_RADIUS = 20px (not needed this just rounds your container corners so its ideal for certain borders) - CONTAINER_BORDER_IMAGE_SLICE = 13
CONTAINER_BORDER_IMAGE_WIDTH = 20px
CONTAINER_BORDER_IMAGE_OUTSET = 10px
CONTAINER_BORDER_IMAGE_REPEAT = round - CONTAINER_BORDER_IMAGE_SLICE = 25%
CONTAINER_BORDER_IMAGE_WIDTH = 20px
CONTAINER_BORDER_IMAGE_OUTSET = 10px
CONTAINER_BORDER_IMAGE_REPEAT = repeat
Also heres how to get a white blur border
CONTAINER_SHADOW_COLOR = white
CONTAINER_SHADOW_OFFSET = 0px 0px
CONTAINER_SHADOW_SPREAD = 10px
CONTAINER_SHADOW_BLUR = 6px