[1.20.1] ClassCastException: WorldSchematic Conflict with Valkyrien Skies/Sodium During Block Entity Rendering

[FlyingPartical]

discription
The game crashes with a ClassCastException when using Litematica to load schematics. The crash occurs because WorldSchematic cannot be cast to the vanilla world class, likely due to a conflict between Valkyrien Skies 2 and Sodium's rendering logic. Disabling Litematica resolves the crash, but the schematic functionality is required.

Steps to Reproduce

1. Install Litematica + Valkyrien Skies 2 + Sodium
2. open a world
3. crashes when loading terrain

Versions
Minecraft: 1.20.1
Fabric Loader: 0.16.10
Litematica: 0.15.4
Valkyrien Skies 2: 2.3.0-beta.5
Sodium: 0.5.11
Other critical mods: Fabric API 0.92.3, Iris 1.7.5

Attempted Fixes
Disabling Valkyrien Skies or Litematica temporarily resolves the crash.

crash-2025-01-29_14.03.50-client.txt

[vacla]

Duplicate of #876 .
See for more info: #876 (comment)