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This is the less popular figure-8 immersion of the klein bottle. This version has three half twists and its cross sections are lemniscates.
The irregular hole pattern has been calculated by simulating a Gray-Scott reaction diffusion process on the surface.
The algorithm has been modified so that at the sites of self-intersection, the different parts of the surface do not touch but instead weave through each other's holes.
This colored version has a blue-orange contrast at the self-intersection and is dark otherwise.