[MCM-899] Lighting doesn't propagate correctly through chunk/subchunk borders

Partner Rank:

Partner Team Reporting:

Jigarbov Productions

Verification builds and Platforms:

1.13.0.34 Minecraft - Publish_3406689
1.14.0.51 Minecraft - Publish_3468669

Summary:

Lighting doesn't propagate correctly through chunk/subchunk borders

Impact:

Looks bad... especially on builds that line up with chunk borders. Can cause balancing issues if an area or secret shouldn't be hidden.

Repro Steps:

Make a build where entire chunks/subchunks are squared off
leave the world
open the world
look at it

Observed Results:

Lighting doesn't propagate through/around the chunk borders properly so there are large dark voids where light should get to. Same thing with glowstone and torches.

Expected Results:

Lighting should work consistently whether on a chunk border or not.

Screenshots attached:

above,

repro world attached

Regression Builds:

1.12.1