Yeah I want to upload picture to make users can customized background but

Actually our background has a sprite and contains 11 pictures as the background. What I really achieve is upload the picture in and use the base64 to change the baseTexture. But I think to upload the picture I really need to plug the picture I uploaded into the sprite so the sprite will contain 12 pictures or more. Can it be achieved? Or it is not possible at all?

I never used it i have no idea how it works i just know it exist
IDK if you can resize it or adjust after it being loaded
So right now we have same level of knowledge
Any question you may ask me you can ask yourself since you will be as capable to answer it as i do
ONLY thing i know there is also extension render to sprite
Which works like displaying one sprite as another kinda like making TV display from sprite (very useful for NOT having 2 sets of items you have on hotbar and other for what you hold in hand)
So technically you could load image to one sprite
Then render it to another sprite and then change width and height of that another sprite to width and height of your screen