26.3 Snapshot 7 (known as 26.3-snapshot-7 in the launcher) is the seventh snapshot for Java Edition 26.3, released on August 4, 2026, which adds concrete stairs and slabs in 16 colors and new explorer maps for various structures; it also updates the texture of maps and the loot of abandoned camps, and turns explorer maps into unique items. Full changelog: https://minecraft.wiki/Java_Edition_26.3-snapshot-7