Java Edition 1.13-pre2

1.13-pre2 is the second pre-release for 1.13.

Additions

 * Added stripped bark blocks of all 6 types of wood

Changes

 * Optimized title screen.
 * Reverted the bark block changes from the previous version.
 * Packed ice can now be crafted from 9 ice.
 * Various performance optimisations.