Java Edition 1.15 Pre-release 1

1.15 Pre-release 1 (known as 1.15-pre1 in the launcher) is the first pre-release for Java Edition 1.15, released on November 21, 2019.

Blocks

 * Dark prismarine is now crafted from black dye instead of ink sacs
 * Increased scaffolding burn time when used as fuel in a furnace

General

 * Changed the button highlight to make it easier to distinguish which button is selected
 * Optimized chunk rendering
 * Optimized explosions
 * Recipe changes to match Minecraft Bedrock
 * Updates to the Resource pack format
 * The resource pack version is now 5
 * The game now tries to make out of date resource packs work as much as possible