Hey I’ve goofed around with this a little bit in the past. @roymacdonald is right in that ofxVoronoi is a huge help. It will calculate a set of points for a Voronoi diagram, which has a mesh-like appearance like the link in the original post. The Voronoi points can then be used to create an ofMesh if needed. The Voronoi diagram itself is generated from a set of points, which can be obtained in a bunch of different ways. For instance, the points could be determined from a threshold value of brightness, or color, or a comparison of pixel values within a region, etc. Some of the functions in ofxCV are super helpful for this.