A Procedural Polka Dot Shader with Analytic Normals

This tutorial uses Blender Support us on Patreon: 00:00 Intro 00:55 Set up the shader 01:35 Implicit sphere equation 04:30 Center UV space 05:30 Implementation 07:15 Create 3D vectors 08:20 Convert to tangent space 10:10 Fix normals outside of sphere 12:35 Evaluate normal map 13:00 Tiling 14:55 Offsetting odd rows The finished shader Today we’ll build a procedural shader that produces a polka dot pattern. While this is quite informative, as we learn how to tile the uv space, the interesting part is creating the normal map. We want to use the implicit sphere equation to derive z coordinates for the uv vectors to create sphericals normals. Transforming these to tangent space gives a beautiful and correct spherical normal map. Download the Shader file: