ModsJava
Blueprint overlay
A Minecraft client side mod to project, scale and rotate real blueprint schematics and images into your world as in-place references for creating accurate…
⬇ Download on CurseForge

A Minecraft client side mod to project, scale and rotate real blueprint schematics and images into your world as in-place references for creating accurate builds.
Blueprint overlay is a free Minecraft Java mod. Compatible with Minecraft 1.21.11, 1.21.10, 1.21.9, 1.21.8 and newer. Downloaded 6,753 times (via CurseForge). Download it and open it directly in the game.