Originally Posted by Corellianrogue
I'm torn between whether grain should be removed from animation or whether it should be retained. I think maybe they should keep it since it gives them a more historic and film-like look and shows children (and adults in the future that might not know) that they're classic cartoons rather than ones made yesterday on a computer.
In a way the issue of DNR is even more critical to animation. Because of the clarity and relatively low detail compared to live-action, the devastating effects of a poorly done noise-reduction job become even more apparent.
This was covered long ago in the DVD era, (just google "cartoon" and "DVNR" for example) but basically, if you're not careful, the algorithm will not only remove grain, but whole sections of outlines and other painted detail, or thin them out and smear for an unattractive, oily look. If they don't spend a lot of money to do it right, which I seriously doubt they'd be willing to do for the hundreds of Looney Tunes and Disney shorts, it's better not to touch them at all. Personally I also agree with the above poster, I think the grain gives the animation even more life.