The criteria for a good density depend on its intended use.

“because it really depends on what you end up using your density for. Right? If you like let's say you are like a completely deep learning build, you want to have just a large model which kind of describes the density of images. Right? You do diffusion, we have kind of get to that, but we are doing diffusion for image modelling. Then what you ultimately interested in is you want a density”