Someone on the Studio Artist User Forum asked about using a temporal frame difference mask to mask a flat color cartoon stylization video processing effect. One issue with this kind of approach is that you end up creating a perceptual smear effect due to slight color variations in the cartoon stylization that get rendered in a narrow moving band (where the band is the temporal mask. Its kind of a fun still image or video special effect, and it does smooth out color flicker associated with slight variations in the flat color regions in the full image, but you are trading off one issue for another if you want an idealized solution to color flicker (at least in this example).
We can of course construct a more elaborate temporal mask, and if you do this you can clean things up as shown below.
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