When I referred to sampling I was talking about the joint distribution of all pixels (hence &quot;space of images&quot;), which would work fine. But I suspect predicting distributions is impractical, it may be better to use methods that sample directly without ever explicitly finding the distribution.<p>You do need a source of entropy to perform the sampling. This amount should be more than a minimum given by how precisely you want to sample from the continuous source, related to the Kullback-Leibler divergence of the distribution.