When you're in lava, the orange appears darker/completely black at y=30 and below

hi. i cant see that bug

its normal orange lava

It doesn't affect minecraft 1.13 anymore

I can still reproduce in 1.13.

The darkness of your screen changes with the y-coordinate. The lower it is, the darker the overlay gets.
Can also be observed when looking at the y-coordinate of the screenshots.

What Lord_Quadrato says is true. The orange starts getting darker around y=30 and is completely black around y=12 and below. This is also the case in 1.12.2 so I assume it works as intended.

Can no longer reproduce this in 1.16-pre3. Can someone please double check?

@unknown: I can't reproduce either.

Can't reproduce in 1.16-pre3 anymore either

Same, can't reproduce. This can be marked as fixed, must be a result of the fire resistance related visibility changes.

Seems to actually predate the fire resistance changes; I was able to reproduce in 20w22a but not in 1.16-pre1.