You create a niche by looking at layers of a niche. What appears like one niche is actually a rubble pile of loose rocks held together by some gravity. You can

You create a niche by looking at layers of a niche. What appears like one niche is actually a rubble pile of loose rocks held together by some gravity. You can pick off some larger rocks and create your own niche around that. Basically niches are a bit like Mandelbrot sets. If you study then you will see more creases and patterns at the edges.