Oops! All Missing Blocks!

Additions:

• The beam from a Beacon is now a checkerboard.

Adjustments:

• Some textures in the entity folder were moved to subfolders in 26.1 Snapshot 2, so they now coexist in order to maintain backwards compatibility.

Metadata:

• Flavor text on the resource pack screen now shows "1.13 - 26.1" as the supported versions.
• Bumped resource pack version to 77 to be marked as compatible with 26.1 Snapshot 2.