This is a hot topic. Many argue that using an X-Ray texture pack is cheating because it bypasses the core gameplay loop: Strip mining at Y=11 until you find diamonds.
This pack focuses purely on efficiency. It removes all "noise" textures. You won't see grass, leaves, or decorative blocks—only stone, deepstone, and ores. This pack specifically optimizes for the 1.12.2 Forge environment. minecraft 112 xray texture pack
Click on Options -> Resource Packs -> Open Resource Pack Folder . This is a hot topic