Discovered while fixing MC-237435.
The bug
Certain blocks which are intended to appear identical in-game are defined differently. This report specificaly highlights the petrified oak slab, as its definition for this differs from other such blocks.
In most cases, if blocks are intended to appear identical, then the blockstates (and, if applicable, items) parameters will point to the same model file, rather than pointing to two different but visually identical model files. The petrified oak slab seems to disrupt this, as it has dedicated block models despite appearing identical to the oak slab.
List of such blocks:
Subject | blockstates/ target | models/item/ target |
|---|---|---|
Waxed copper blocks | ✔ Respective unwaxed block | ✔ Respective unwaxed block |
IInfested blocks | ✔ Respective non-infested block | ✔ Respective non-infested block |
All double slabs | ✔ Respective full block* | N/A |
8 layers of snow | ✔ snow_block.json | N/A |
Petrified Oak Slab | ❌ petrified_oak_slab(_top).json | ❌ petrified_oak_slab.json |
*excluding smooth stone, which has a dedicated different model
How to fix
The attached resource pack fully fixes this issue, as well as MC-237435 and the slab portion of MC-235694. A simpler pack that fixes only this issue can be attached instead if desired, however fixing all three issues is recommended.
Can confirm in 21w39a