Try out test cases which don't have hard edges, and also not only Gaussian edges (Gaussian falls quite fast to zero). Instead e.g. try a linear or Lorentz-like target density distribution or a combination of low and high density targets next to each other. In some smaller test the low density target will be forced to 0 by accident, because the high density target confuses the mask process -> See also #57
Try out test cases which don't have hard edges, and also not only Gaussian edges (Gaussian falls quite fast to zero). Instead e.g. try a linear or Lorentz-like target density distribution or a combination of low and high density targets next to each other. In some smaller test the low density target will be forced to 0 by accident, because the high density target confuses the mask process -> See also #57