The Procedural Tartan Shader provides a node-based system for generating checkered tartan and plaid patterns. It includes three distinct node groups tailored for different workflows: a manual setup for visually matching reference photos, and two automatic setups (standard and symmetrical) designed to work with precise thread count data from online pattern generators. The package also comes with a library of 110 ready-to-use assets, comprising 40 two-color and 70 three-color shader variations.