How To Fix There is a syntax error with the shader for a material called "Surface shader"

Fixing a Shader Error in Unity by Replacing "UnityGlobalIllumination.conc"

This tutorial will guide you through resolving a shader error related to the "UnityGlobalIllumination.conc" file in Unity. This error typically presents itself as an unexpected token 'S' and can prevent your project from running correctly.

Symptoms:

• Encountering a shader error message mentioning "UnityGlobalIllumination.conc" and an unexpected token 'S' around line 10.
• Issues rendering materials in your Unity scene.

Solution:

1. Download the Replacement File:

   • Visit the following link in your web browser: https://github.com/topics/global-illumination?l=c%... (This is the GitHub repository for Unity Built-in Shaders by TwoTailsGames)
   • Scroll down to the file named "UnityGlobalIllumination.cginc".
   • Click the "Raw" button next to the filename. This will display the code content.
   • Right-click anywhere on the code and select "Save As..." (or equivalent option on your browser).
   • Choose a convenient location on your computer to save the file. Make sure to save it with the exact name "UnityGlobalIllumination.conc".
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2. Locate the File in Unity:

   • Open your Unity project.
   • Important: Close the Unity Editor completely before proceeding to the next step.

3. Replace the Existing File:

   • Navigate to the following directory in your file explorer:

     C:\Program Files\Unity\Hub\Editor\**[Your Unity Version Number]**\Editor\Data\CGIncludes
     

   • Important: Replace [Your Unity Version Number] with the actual version number of Unity you are using. You can find this information by opening the Unity Editor, navigating to Help > About Unity.

   • Locate the original file named "UnityGlobalIllumination.conc" in this directory.

   • Back up the original file by copying and pasting it to a different location as a safety precaution (optional but recommended).

   • Copy the downloaded "UnityGlobalIllumination.conc" file from step 1.

   • Paste the copied file into the "CGIncludes" directory, replacing the original file.

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4. Restart Unity Editor:

   • Launch the Unity Editor again.

After restarting Unity, the shader error should be resolved.

Additional Notes:

• This solution assumes you have a basic understanding of file management and navigating directories on your computer.
• Download the "UnityGlobalIllumination.conc" file from the specific version of the Unity Built-in Shaders repository that matches your Unity version.
• If you encounter any difficulties, consider searching Unity forums for further assistance related to shader errors.

By following these steps and incorporating screenshots, you can create a comprehensive and informative blog tutorial to help other Unity users fix similar shader errors.