Abillity to dump the texture atlas for java edition resourcepacks debugging

Im working on making compatibility with a resource pack that modifies how a block looks based on its atlas position. In a modded scenario like what im dealing with its impossible for me to check it directly and troubleshoot it. The idea of making this file "blocks.png-atlas" visible in an accesible location that isnt the vram would be really good for people like me looking into what is happening in the game