Instant Reaction Diffusion is a Geometry Nodes setup that generates procedural organic pattern growth animations in real-time. It functions as a modifier, allowing you to add reaction diffusion effects to any subdivided mesh without scripting. Users can mix up to two noise patterns to create unique shapes and adjust settings like displacement height, scale, and animation speed directly from the modifier panel.

The setup includes 15 ready-to-use materials compatible with both EEVEE and Cycles. Once your animation is configured, you can bake the simulation nodes natively within Blender to secure the cache. The generated patterns can also be applied as modifiers and baked out into diffuse, displacement, and normal maps for texturing.