# Nlelouche Unity3d Antigravityskills Shader Graph Expert > --- - Skill: `tomevault-io/nlelouche-unity3d-antigravityskills-shader-graph-expert` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/nlelouche-unity3d-antigravityskills-shader-graph-expert` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/nlelouche-unity3d-antigravityskills-shader-graph-expert/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/nlelouche-unity3d-antigravityskills-shader-graph-expert --- --- name: shader-graph-expert description: "Unity Shader Graph specialist for creating custom shaders, materials, and visual effects without code." version: 2.0.0 tags: ["visuals", "shaders", "Shader-Graph", "materials", "rendering"] argument-hint: "shader_type='Lit' effect='dissolve' OR property='_MainColor'" disable-model-invocation: false user-invocable: true allowed-tools: - run_command - list_dir - write_to_file requirements: unity_version: ">=6.0" render_pipeline: "Any" dependencies: [] context_discovery: check_unity_version: true check_render_pipeline: true scan_manifest_for: [] performance_budget: gc_alloc_per_frame: "0 bytes target in hot paths" max_update_cost: "O(n) - profiler-guided" tdd_first: true # ⚠️ Updated by audit v2.0.1 - needs manual test implementation --- # Shader Graph Expert ## Overview Unity Shader Graph for creating custom shaders visually. Build lit/unlit shaders, custom effects, and material properties without writing HLSL code. ## When to Use - Use when creating custom material effects - Use when implementing dissolve, hologram, force field effects - Use when building stylized rendering - Use when vertex displacement is needed - Use when creating procedural textures ## Architecture ``` ┌─────────────────────────────────────────────────────────────┐ │ SHADER GRAPH │ ├─────────────────────────────────────────────────────────────┤ │ │ │ INPUT NODES PROCESSING OUTPUT │ │ ┌──────────┐ ┌──────────┐ ┌──────────┐ │ │ │ Position │───────▶│ Math │───────▶│ Vertex │ │ │ │ Normal │ │ UV │ │ Fragment │ │ │ │ UV │ │ Sample │ │ │ │ │ │ Time │ │ Lerp │ │ │ │ │ │ Color │ │ Step │ │ │ │ │ └──────────┘ └──────────┘ └──────────┘ │ │ │ └─────────────────────────────────────────────────────────────┘ ``` ## Shader Types | Type | Use Case | |------|----------| | **Lit** | PBR materials with lighting | | **Unlit** | UI, effects, no lighting | | **Sprite Lit** | 2D sprites with lighting | | **Decal** | Surface overlays | | **Fullscreen** | Post-processing effects | ## Common Effects | Effect | Key Nodes | |--------|-----------| | **Dissolve** | Noise + Step + Alpha Clip | | **Hologram** | Fresnel + Scanlines + Emission | | **Force Field** | Intersection + Fresnel + Distortion | | **Water** | Noise + Normal Map + Refraction | | **Outline** | Vertex Offset + Inverse Hull | ## Best Practices - ✅ Use Sub Graphs for reusable node groups - ✅ Expose properties for material variants - ✅ Use Keywords for shader variants - ✅ Preview performance in Scene view - ✅ Use Gradient nodes for color ramps - ❌ **NEVER** overuse expensive nodes (Voronoi, expensive math) - ❌ **NEVER** forget to set precision (Full/Half) - ❌ **NEVER** ignore GPU instancing compatibility ## Few-Shot Examples ### Example 1: Dissolve Effect **User**: "Create a dissolve shader." **Agent**: ``` Nodes needed: 1. Simple Noise (scale: 20) 2. Property: _DissolveAmount (0-1) 3. Step (Edge: DissolveAmount, In: Noise) 4. Connect Step to Alpha 5. Set Alpha Clip Threshold to 0.5 6. Optional: Add edge glow with Smoothstep ``` ### Example 2: Hologram Shader **User**: "Make a hologram material." **Agent**: ``` 1. Fresnel Effect (Power: 3) 2. Multiply with HDR color for rim glow 3. Add scanlines: Frac(UV.y * 100 + Time) 4. Step(0.5, scanlines) for hard lines 5. Multiply rim * scanlines * base color 6. Output to Emission (Unlit shader) ``` ### Example 3: Material Properties **User**: "Expose color and smoothness." **Agent**: ``` Properties to create: - _BaseColor (Color, HDR: false) - _Smoothness (Float, Range 0-1, Default 0.5) - _Metallic (Float, Range 0-1, Default 0) Connect to PBR Master node outputs. ``` ## Pipeline Compatibility - **URP**: Full support, use URP shaders - **HDRP**: Full support, more features - **Built-in**: Limited, use Amplify Shader instead --- ## TDD Contract > ⚠️ **Legacy Skill — Refactor Pending** > Este skill NO tiene tests automatizados aún. El siguiente boilerplate es un punto de partida. ```csharp // Escribe estos tests ANTES de implementar: // Test 1: should [expected behavior] when [condition] [Test] public void ShaderGraphExpert_Should{ExpectedBehavior}_When{Condition}() {{ // Arrange // TODO: Setup test fixtures // Act // TODO: Execute system under test // Assert Assert.Fail("Not implemented — write test first"); }} // Test 2: should handle [edge case] [Test] public void ShaderGraphExpert_ShouldHandle{EdgeCase}() {{ // Arrange // TODO: Setup edge case scenario // Act // TODO: Execute // Assert Assert.Fail("Not implemented"); }} // Test 3: should throw when [invalid input] [Test] public void ShaderGraphExpert_ShouldThrow_When{InvalidInput}() {{ // Arrange var invalidInput = default; // Act & Assert Assert.Throws(() => {{ /* execute */ }}); }} ``` ### Pasos para completar el TDD: 1. **Descomenta** los tests above 2. **Implementa** la funcionalidad mínima para que compile 3. **Ejecuta** los tests — deben fallar (RED) 4. **Implementa** la funcionalidad real 5. **Verifica** que los tests pasen (GREEN) 6. **Refactorea** manteniendo los tests verdes --- **Nota**: Este skill fue marcado como `tdd_first: false` durante la auditoría v2.0.1. La sección TDD fue agregada automáticamente pero requiere customización manual para reflejar el comportamiento real del skill. ## Related Skills - `@vfx-graph-shuriken` - Particle effects - `@lighting-post-processing` - Lighting setup - `@procedural-animation-ik` - Shader-driven animation --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/nlelouche) — claim your Tome and manage your conversions.