Game crashes at login/loading screen – Shader Decompression Failure

[K]

Hi, the game crashes with a shader decompression error:

Fatal error: [ShaderCodeArchive.cpp] [Line: 378]
Could not decompress shader group with Oodle.
Group Index: 1613
Group IoStoreHash: fc82855971576194e6d7b709
Shader Hash: FF32C0668C9ED896F77E9D04295458FA6EB621 

I’ve already tried:

Deleting %localappdata%\RSDragonwilds\Saved, ShaderCache, etc.

Removing Saved / Intermediate / DerivedDataCache from the Steam game folder

Verifying files via Steam

Running with -dx11 and other launch options

Nothing helps — the error persists and crashes consistently after brightness or login screens.

It seems the packaged shader group might be corrupted. Would appreciate if this could be looked into! Thanks 🙏

[Panelovn]

Did you try Steam launch options, set: -vulkan

[yatowari]

I resolved this with launchOption: -vulkan as Panelovn mentioned.

If the game still crashes, reduce graphics. I had to drop mines to High from Epic.