Top surfaces of waterfalls and lavafalls are culled too aggressively

[thescyphozoa]

Expected Behavior

The slanted top surfaces of this waterfall should remain visible at least until the player perspective is completely underneath them.

Actual Behavior

These surfaces become invisible when the player perspective gets below a certain Y-coordinate, even though they are still in view from the top. In some cases I can even see it happen with vertical surfaces, though I suspect these won't be visible once the top surfaces are fixed.

Reproduction Steps

Find a decently sized waterfall, stand a few blocks back from it, move up and down.

Attachments

https://streamable.com/v57a0y (top surfaces)
https://streamable.com/vv6eab (vertical surfaces)

System Information

• Java Version: 8.0.51
• CPU: AMD Ryzen 5 5600x
• GPU: Nvidia RTX 3060 Ti
• Also happened on a different computer with Intel Core i5-6500 and Nvidia GTX 1070

[LucilleTea]

Duplicate of #171.
This is already fixed in the next branch, or on the release branch you can work around the issue by disabling the "chunk face culling" option.