Raymarching Distance Fields : Concepts and Implementation in Unity (Adrianb)
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Adrianb
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Adrian Biagioli’s 2016 writeup introduces raymarching signed distance fields entirely in a Unity screen-space image effect on a full-screen quad - no mesh geometry per object.
Covers view-frustum ray setup, analytic SDF composition, march loops, basic lighting, and depth-buffer occlusion against traditional mesh renderers. References Inigo Quilez demos and ships a GitHub reference project.
Explains why distance fields yield smooth silhouettes compared to tessellated meshes. Intermediate Unity + HLSL readers use it before jumping to Shadertoy or Shader Graph custom render passes.
Still cited as a clear bridge from polygon pipelines to implicit surface rendering inside Unity’s post stack.
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