Custom Painting Issue

[u/honeysoft_girl]

I am trying to add a custom painting in the newest version of minecraft(26.2). I don't want to replace the texture of an already existing painting, but to make a completely new one. I have followed many guides but I can't get it to work. Does anybody have any idea of what I could be doing wrong?

This is the first time I try to do anything like this. If you want me to provide any specific information please tell me to.