PNG files within a custom texture pack folder. By replacing the texture of common blocks with a transparent PNG, the game engine fails to render them, revealing everything hidden behind them. Bloxd.io Wiki Note on Usage
: These "packs" were designed to make common blocks (like Dirt, Stone, and Grass) transparent or semi-transparent. This allowed players to see through the terrain to locate valuable ores like Iron, Gold, and Diamonds, or to find hidden player bases underground. x ray texture pack bloxd io 2021
: Click on the "Texture Pack" or "Graphics" section. Upload Custom Pack : PNG files within a custom texture pack folder