It's not illegal, but if an artist does it, like deliberately copy another artist's style, as in more than a tribute but an attempt at carbon copy, that artist

It's not illegal, but if an artist does it, like deliberately copy another artist's style, as in more than a tribute but an attempt at carbon copy, that artist is almost shunned. So the nonlinear diffusion systems out there are told by prompt to make what in the art world is considered to be very rude.