MC-129475Straight wall collision box expands when something is above it.
Prior to the 1.13 snapshots, straight walls that connected to only two opposing sides would keep the same smaller collision box regardless of if there was something placed on top of them or not. Now they expand to match the rendered size. It's possible that this is intended however this also means that if a player is up against it when it expands, they glitch into it a bit if they try to push forward.
Environment
Windows 7 64-bit with Java 8 Update 171 64-bit
Created Issue:
Straight wall collision box expands when something is above it.
Prior to the 1.13 snapshots, straight walls that connected to only two opposing sides would keep the same smaller collision box regardless of if there was something placed on top of them or not. Now they expand to match the rendered size. It's possible that this is intended however this also means that if a player is up against it when it expands, they glitch into it a bit if they try to push forward.
Environment
Windows 7 64-bit with Java 8 Update 171 64-bit
![[Mod] Michael Wobst](../../../data/avatars/users/37868.png){kind=small}
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Are you referring to cobblestone walls?
Yes, Cobblestone and Mossy Cobblestone walls.
Affects 18w50a
Affects 1.16.4 but in my opinion should be marked as WAI, as when the Cobble Wall render extends, the hitbox does too.
This is expected, and likely intentional behavior. Considering the 'pillar' model of the wall has collision matching it's hitbox when present alone, the collision should be preserved when that model part is used elsewhere.
This can be backed up by
MC-122195which fixed both the cauldron and ender portal eye to have both their collision match with their visual appearance.