YY_Voronoi 2 generates procedural Voronoi textures inside After Effects. It can be used for a range of textures, from terrain maps to water caustics to abstract backgrounds, and layering different Voronoi patterns lets you achieve variations in complexity. The plugin exposes controls for offset, grid size, contrast, brightness and dispersion, along with a random seed to change the cells' start behavior.
Color calculation modes cover Square Distance (the default, fast option), Absolute Distance with high contrast and linear falloff, Edge Distance based on distance from the cell boundary, and Discrete modes for a mosaic effect with no color variation within cells. Distance metrics include Euclidean for organic, unconstrained boundaries and Manhattan for sharp 45 degree boundaries. Dispersion can be driven by the current layer's pixels, where black means no dispersion and white means full dispersion.
Version 2 introduced a completely redesigned algorithm and native code implementation for improved render speed and compatibility, plus repeat options for horizontal and vertical grid tiling. Evolution settings animate the cells, with an evolution period for seamless loops. It maintains full backwards compatibility with previous versions.