Voronoi-based Lava in Unity Shader Graph

Voronoi diagrams are great for modelling natural shapes like biological cells, and they also excel at creating lava that flows between chunks of rock. Shader Graph's built-in Voronoi node doesn't provide enough information about the edges of the 'cells', so we'll have to write custom code, which I'm basing on Inigo Quilez's great examples. With a custom function node, we can then build a customizable lava effect with different textures, thicknesses, and most importantly, wiggle.

I'm using Unity 2022.3.0f1, although this technique will work in previous (and presumably subsequent) versions of Unity.
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👇 Download the project on GitHub: https://github.com/daniel-ilett/shade...

📰 Read this tutorial in article format instead: https://danielilett.com/2023-06-20-tu...

🌐 Read Inigo's article about Voronoi edges: https://iquilezles.org/articles/voron...
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🌐 AmbientCG Textures: https://ambientcg.com/view?id=Rock028 and https://ambientcg.com/view?id=Lava004
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00:00 Intro
00:34 The Voronoi Function
02:15 CustomVoronoi.hlsl
04:28 Custom Functions
05:18 Rock Islands
07:11 Lava Wiggle
08:38 Rock Colors
09:37 Lava Colors
10:43 Rock Normals
11:49 Lava Material
12:07 Outro

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