When more than one fractal exists in a space (domain, environment...), there find a multifractal. Imagine a Bach fugue played simultaneously with Für Elise. The separate fractalities of the fugue and Beethoven piece would be incoherent.
Two (beautiful) interfering fractals could produce cacophony. In other contexts, separate fractals would not necessarily produce either destructive or constructive interference. Separation and isolation of each fractal could involve a kind of signal filtering.
