If you are on DirectX 11 or 12, try switching to a lower version in the game's graphics settings (e.g., DirectX 10 or 10.1 for GTA V) or using the -dx11 or -dx12 launch options in Steam.
If a specific shader file within the game directory is missing or broken, the game won't launch. Right-click the game > Properties Installed Files Verify integrity of game files Epic Games: Click the three dots next to the game > Are you still seeing the error after trying these steps? Let me know which errgfxd3dshader1 best
Click the gear icon next to the Play button → Scan and Repair . 3. Clear Shader Cache If you are on DirectX 11 or 12,