Unlike standard texture packs, simply making a texture transparent in a photo editor will often result in "black" or opaque blocks in-game because the block model still tells the game to render those faces. To create a true X-ray effect, you must modify the blockstates or models/block files.
: Allowed. Servers like 2b2t permit any modifications. minecraft 112 xray texture pack
The best packs are optimized to work with OptiFine. This prevents the "black screen" glitch where hidden blocks render as solid black squares instead of transparent space. Unlike standard texture packs, simply making a texture