There's a secret world type in minecraft called debug mode and you can generate it by shift clicking multiple times on the world type button. This is very useful for resource pack
MC-4077] Player hitboxes in debug mode are rendered too high - Jira
Debug Mode Survival! - Maps - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum
Blocks I found in the snapshot with Debug mode - Discussion - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
The most forgotten feature of Minecraft: Debug Mode : r/Minecraft
How to Get a SECRET WORLD!!!!!! (Debug Mode) : 3 Steps - Instructables
MC-167061] FPS/TPS graphs on F3 screen are empty in spectator mode - Jira
Debug Mode | Minecraft Wiki | Fandom
Debug Mode Survival! - Maps - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum
Debug mode – Minecraft Wiki
MC-190517] Missing Space in Debug Screen between Graphics Mode and Previous Word - Jira
Minecraft: Java Edition - Debug Menu – Home
Minecraft: Java Edition/Debugging Material - The Cutting Room Floor
Minecraft: How To See The Debug Screen (And What It's Useful For)
How do i get rid of this graph in my debug screen. : r/MinecraftHelp