3.1 is a release file of the Minecraft resource pack BlueBlocksCraft Vanilla, made for Minecraft 1.9.1, 1.9.3, 1.10-Snapshot, 1.9.4, 1.9.2, 1.12.1, 1.12, 1.10.2, 1.11, 1.10, 1.10.1, 1.9-Snapshot and more. It was published on July 29, 2018 and is 2.6 MB in size. For the full description, screenshots and every other version, visit the BlueBlocksCraft Vanilla resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.
