Does the same go for vertical lines? as in black lines sometimes appearing during fast motion on lighter coloured objects etc?
As in this dudes video. You can just about make em out in the search bar of the facebook page he is looking at if you fullscreen
https://www.youtube.com/watch?v=vyAgjkm3uO8
They are the interlace pattern artifacts I was referring to, actually. I assume the horizontal patterns Twirlywoos was seeing are similar and would affect all models as well. Although I haven't actually seen these myself, specifically. A bit odd.