While "update your drivers" is standard advice, RDR2 is sensitive to specific versions.
The most effective fix is to force the game to rebuild its shader library. errgfxd3dshader1 work
Navigate to: Documents\Rockstar Games\Red Dead Redemption 2\Settings . While "update your drivers" is standard advice, RDR2
Misalignment between the game's API settings and your hardware. errgfxd3dshader1 work
If you are using Vulkan, switching to DirectX 12 (or vice-versa) can bypass the specific D3D shader failure.
This error usually triggers during the game’s loading screen or when entering a high-fidelity environment. The primary culprits are:
Graphics cards lacking the necessary instructions for the game's engine.