Custom blocks using the minecraft:geometry.full_block geometry identifier have their down faces UV mapped incorrectly

Partner Rank: 3 (Normal)

Partner Team Reporting: Oreville Studios

Verification builds: 1.20.70.21_RC1 (Windows 10, Partner Build 21596268)

Regression Builds: N/A, issue with new feature

Summary:

Custom blocks using the minecraft:geometry.full_block geometry introduced in the R20U6 previews have their down faces UV mapped incorrectly compared to simple blocks.json blocks.

Impact:

There is no large impact as this block geometry is still in beta and preview versions of the game, meaning no content uses this geometry identifier yet. Having the bottom face UV mapped incorrectly in-game means that the bottom face of the block will render differently than what is displayed in Blockbench or other modelling programs, causing confusion.

Repro Steps:

1. Download the attached world with the repro behavior pack and resource pack applied.
2. Enter the world.
3. View the different custom blocks placed. Take note of the colors in the corners. Observe all the different faces of both blocks.

 

Observed Results:

The full block geometry block has all faces except the bottom face mapped correctly. The bottom face has the texture flipped in both dimensions compared to the simple blocks.json block.

Expected Results:

All faces of both the full block geometry block and simple blocks.json block are identical and mapped correctly.

Screenshots: