The Bug
The side walls, like those shown in the image, need a significant distance for z-fighting to happen. Perpendicular walls, however, start z-fighting rather early.
Steps to Reproduce
Summon a large box of powder snow surrounded by blocks.
/fill ~1 ~ ~1 ~25 ~4 ~25 minecraft:stone /fill ~2 ~ ~2 ~24 ~4 ~24 minecraft:powder_snow
Switch into spectator mode, go inside of the powder snow, and look at the walls of the box.
Take note as to whether or not powder snow z-fights with distant block faces.
Observed Behavior
Powder snow z-fights with distant block faces.
Expected Behavior
Powder snow would not z-fight with distant block faces.
Related issues
discovered while testing
is duplicated by
relates to
Attachments
Comments


Can confirm
Relates to MC-205199.
Can confirm in 21w13a.
Can confirm in 21w14a.
Can confirm in 21w15a.
Can confirm in 21w16a.
Can confirm in 21w17a.
Can confirm in 1.17.
Can confirm in 1.17.1.

Can confirm in 21w38a.

Can confirm in 21w39a. Relates to MC-220488.

Can confirm in 21w40a.

Can confirm in 21w41a.

Can confirm in 21w42a.

Can confirm in 21w43a.
I am also able to confirm this behavior in 21w43a. Here are some extra details regarding this problem.
The Bug:
Powder snow z-fights with distant block faces.
Steps to Reproduce:
Summon a large box of powder snow surrounded by blocks.
/fill ~1 ~ ~1 ~25 ~4 ~25 minecraft:stone
/fill ~2 ~ ~2 ~24 ~4 ~24 minecraft:powder_snow
Switch into spectator mode, go inside of the powder snow, and look at the walls of the box.
Take note as to whether or not powder snow z-fights with distant block faces.
Observed Behavior:
Powder snow z-fights with distant block faces.
Expected Behavior:
Powder snow would not z-fight with distant block faces.

Can confirm in 21w44a.

Can confirm in 1.18 Pre-release 1.

Affects 1.18-rc1.
Can confirm in 1.18.1.
Can confirm in 1.18.2.

In 1.19 pre release 2

I found this in 1.20 as well
[media]
Confirmed in 1.21.3

The inner faces don't seem to render at all in 1.21.4?