When texture atlases are large, gaps are rendered between blocks that have a low resolution

This behavior was introduced in 18w46a.

When texture atlases are large, Minecraft causes gaps between blocks that have low resolution.

Steps to reproduce

1. Generate a flat world with grass blocks as the top layer.

2. Change the time to night:

   time set night

3. Load the resource pack in the attachment. (AtlasTest.zip)

4. Look down