This resolution is the for Minecraft player skins. It replaced the older 64x32 format back in 2014 (Minecraft version 1.8).
He opened the PNG like a sacred scroll.
While you can edit the PNG directly in Photoshop or GIMP, it’s much easier to use a dedicated skin editor that supports the 64x64 format. minecraft skin 64x64 png
Save your image in PNG format, ensuring that the transparent background is preserved. You can also optimize your image for web use to reduce file size. This resolution is the for Minecraft player skins
In Minecraft, light comes from the top-left. When shading your skin: minecraft skin 64x64 png