Random underwater blocks seem to be missing or flow in different directions at different depths. I did notice that the performance has finally improved back to approximately 30 fps however there are random artifacts in the water but none observed above ground.
Environment
macOS 10.12.6 Intel Core I7-3615QM 2.3G, 16GB 1600 PC3-12800, Intel HD 4000 1536MB, JRE 8, LG Ultrawide 34" via Thunderbolt 2
Linked issues
duplicates 1
Attachments
Comments 4
After additional observations, this has some relation to MC-129409. I did also include a screen capture of two blocks that are shown in which I am standing in and can breathe. (Note, somewhat enjoyable however as even with the turtle helmet, one must wait a really long time to be able to fully use most of this update in survival without cheats due to depths).
Additional note. I did not observe this behavior in past snapshots to my knowledge. This included 18w10b,c,d, 11a, 14a, 15a and 16a. It was all reset in 19b so I cannot comment on the previous snapshot release.