# The shapes of general lemniscates (i.e., Cassinian curves) on the complex plane

On the complex plane, curves given by an equation of the form: $$|z-z_1|\cdot |z-z_2| \cdots |z-z_n| = C$$ with $C \gt 0$, are known as general lemniscates, or Cassinian curves with $n$ foci.

I find it's difficult to depict their shapes on the complex plane. Can you tell me their general shapes, or where can I find them?