Potion of Spelunking - See Ores Through Walls! Minecraft Data Pack
1.16 = xray | Hypixel Forums
How I Organize in Minecraft - Survival Mode - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
Tutorials/X-ray glitches – Minecraft Wiki
Ace's Invisible X-Ray Pack (See diamond through walls!) - Resource Packs - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum
Building Chests into Walls : r/Minecraft
Can see chest carts through walls : r/feedthebeast
Colossal Chests - Minecraft Mods - CurseForge
Detail] Hide your hoppers behind chests by placing maps between them. You can spend the time and make the map look exactly like the surrounding wall texture to hide it completely. :
X-Ray Vision Texture Pack | Minecraft PE Bedrock Texture Packs