There are two primary methods for applying these textures in-game: : Open Bloxd.io and press [O] to open settings. Navigate to the Texture Pack section. Click on Custom and upload your downloaded pack file.
Blocks in Bloxd.io often only render if they are touching air or lava, meaning X-ray cannot always see through solid masses to find "hidden" ores unless they are in an open cave. Bloxd.io Wiki The Legal Alternative: X-Ray Vision x ray texture pack in bloxd io top