Recently I have been working on several personal creative algorithmic projects. Reaction Diffusion is an advanced concept, the creative potential of which not many ‘programmer artists’ grasp. RD systems conform to a containing shape, surface, or volume; any image can be used as activator/depletion/substrate maps; multiple octaves can be implemented. In theory just about anything could be generated by RD systems. Imagine a clothing line printed with complex patterns where each individual article is unique, or a site-specific projection filled with patterns that conform to the architecture. This video shows different parameter sets of an algorithm described by Hans Meinhardt in his book The Algorithmic Beauty of Seashells. It replicates the pattern of the mollusk Oliva Porphyria. Hans provided the core algorithm in BASIC and I ported it to C++ as a case study. It is fun to explore the possibility space.