Used Shaders/Variants Collector (Unity Editor Tool)

This editor utility collects all used shaders/variants in the project into a single ShaderVariantCollection asset.
The collection ensures that required shader variants are precompiled and reduces runtime hitching due to on-demand shader compilation. Can definitely be improved, so feel free to change it to your liking or to fit your project/needs.

Features

• Collects shader variants from:
  • Materials
  • Prefabs
  • Shader/Graphs
• Runs automatically before builds.
• Provides an editor window for manual collection and warmup testing.

Usage

1. Open via menu: Jinnx → Tools → Shader Variant Collector.

2. Set output path for the collection asset (default: Assets/AllGameShaders.shadervariants).

3. Click:

   • Build Collection From Project Assets – creates/updates the collection.
   • Editor Warmup Test – forces a warmup of all variants in Play Mode for hitch-testing.

Build Integration

• The collection automatically rebuilds before each build via IPreprocessBuildWithReport.

Notes

• Keep the collection path under Assets/ so it is included in version control.
• Run Editor Warmup Test to confirm shader variants are available and avoid runtime compilation spikes.