V1.9-SMP_UNDEFINED-1.21.5-1.21.6.zip is a release file of the Minecraft resource pack SMP UNDEFINED, made for Minecraft 1.21.5, 1.21.6. It was published on June 20, 2025 and is 0.7 MB in size. For the full description, screenshots and every other version, visit the SMP UNDEFINED resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.
