fix: use _CLUSTER_LIGHT_LOOP keyword for Unity 6.3+

[sindharta]

No description provided.

[Copilot]

Pull request overview

Updates the URP Toon shader to use Unity/URP’s newer Cluster Light Loop path (Unity 6.3+) instead of the older Forward+ path, and updates shader variant keywords accordingly.

Changes:

• Switched URP shader logic guards from USE_FORWARD_PLUS to USE_CLUSTER_LIGHT_LOOP for directional additional-light handling and GI.
• Added Unity-version-gated shader keywords: _CLUSTER_LIGHT_LOOP for Unity >= 60030000, otherwise _FORWARD_PLUS.
• Adjusted URP rendering-layer encoding macro usage for Unity >= 60030000.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
com.unity.toonshader/Runtime/Shaders/URP/UniversalToonBodyShadingGradeMap.hlsl	Switch directional additional-light loop guard to Cluster Light Loop.
com.unity.toonshader/Runtime/Shaders/URP/UniversalToonBodyDoubleShadeWithFeather.hlsl	Switch directional additional-light loop guard and subtractive-light check macro usage to Cluster Light Loop.
com.unity.toonshader/Runtime/Shaders/URP/UniversalToonBody.hlsl	Switch GI path guard to Cluster Light Loop; adjust rendering-layer encoding macro; add cluster subtractive-check macro handling.
com.unity.toonshader/Runtime/Shaders/UnityToonTessellation.shader	Gate _CLUSTER_LIGHT_LOOP vs _FORWARD_PLUS multi_compile by Unity version; update autogen timestamp.
com.unity.toonshader/Runtime/Shaders/UnityToon.shader	Gate _CLUSTER_LIGHT_LOOP vs _FORWARD_PLUS multi_compile by Unity version; update autogen timestamp.
com.unity.toonshader/Runtime/Shaders/Common/Parts/UnityToonTessellation.shadertemplate	Template update to gate _CLUSTER_LIGHT_LOOP vs _FORWARD_PLUS.
com.unity.toonshader/Runtime/Shaders/Common/Parts/UnityToon.shadertemplate	Template update to gate _CLUSTER_LIGHT_LOOP vs _FORWARD_PLUS.

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[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Comments suppressed due to low confidence (1)

com.unity.toonshader/Runtime/Shaders/URP/UniversalToonBodyShadingGradeMap.hlsl:485

• This directional-light loop is now guarded only by USE_CLUSTER_LIGHT_LOOP, which can drop directional additional lights on Unity/URP versions that still use Forward+ (USE_FORWARD_PLUS).

Use USE_FORWARD_PLUS || USE_CLUSTER_LIGHT_LOOP here so both paths keep the same lighting behavior.

#if USE_CLUSTER_LIGHT_LOOP
    // directional lights in Forward Plus
    for (uint loopCounter = 0; loopCounter < min(URP_FP_DIRECTIONAL_LIGHTS_COUNT, MAX_VISIBLE_LIGHTS); loopCounter++)
    {
        float3 perLightContribution = ProcessAdditionalLightSG(

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.