overlay.png is only used on 1.20.1 due to that version having unfinished nine-slicing APIs.sprites/background.png is used on all 1.21+ versions due to those versions having finished nine-slicing APIs.
This should be included in the next update for clarity and to avoid modpack developers from retexturing the wrong sprite.
overlay.pngis only used on 1.20.1 due to that version having unfinished nine-slicing APIs.sprites/background.pngis used on all 1.21+ versions due to those versions having finished nine-slicing APIs.This should be included in the next update for clarity and to avoid modpack developers from retexturing the wrong sprite.