It’s true that I tried a lot of methods! lots of models, different workflows, changing the order of filters with hybrid, all this while testing to produce in sd 720x576, in sd 768 x 576, in hd, before sending to hybrid, iris, iris + artemis hight, artemis hight + ris, artemis medium + iris, artemis hight + iris, artemis hight + gaia + iris, all that in HD, SD etc… I will try to be brief about my results, which helps me seems to be best for my SD videos, it is to use qtgmc with hybrid everything at “placebo” and above all leaving “final temporal smoothing” at 0. if we put 1, 2 or 3, the image is better , less noise, artifacts etc., but in areas with movement, details become unrealistic, even with 1 as a value. So for me it’s because I’m very picky and I really wouldn’t want to lose any details, but if someone agrees to lose a little detail in the movements, the value of 1 is good. 2 or 3 is too much, and it will clearly lack detail… then in hybrid, I use a dehalo filter, in particular to remove a bit of the white halo from SD videos, something that Vai does not do, a filter by in relation to the color to bring out the dark areas, it is details to recover later with vai. I did some tests with the “nnedi3aa” line filter to smooth out the edges a little, it’s not bad, but when you apply vai models, some scenes can make details a little unrealistic like vegetation, or stones on the ground. especially when you upscale to HD at the end. the other line filters like “eedia” or “maa” smooth the edges even more, so even a little more unreal. the “aaf” filter may be very good, I don’t know exactly how to use it but we can configure it quite extensively. so I think I will continue to experiment with it. I tested quite a bit without a line filter because I tell myself that with the arrival of iris v2, the edges are pretty well repaired overall and if we send a good video processed with hybrid, there will be no loss of detail. the problem is that iris v2 is very good at restoring as much detail as possible, when we produce from SD to SD (without upscaling) there are sometimes strange artifacts which were not there before… I have noticed that when switching from sd to hd, these artifacts are less visible, this is why for me the best setting is to use artemis hight (recovery original details 100) in sd, then to remove the last artifacts, perhaps it will be necessary to use artemis hight + proteus, or the opposite, and then I strongly advise using iris v2 for the upscale in hd, but you have to make sure that it I don’t have too many artifacts anymore, I also tried nyx + artemis hight, nyx + iris, artemis hight sd + iris hd + gaia hd. the gaia model adds a lot of detail or it accentuates the existing details perhaps but it does it very well because the video appears more realistic but what blocks it at this level is that the few artifacts which slip through the mesh of the net per iris, they are filled, and therefore sometimes we have strange artifacts. Anyway, I think a good base to try is artemis medium 100% in sd + iris v2 in hd. I can’t detail all my tests, for the moment, I’ve stopped a bit and I’m waiting in the hope that iris v2 will be just a little improved so that it no longer produces these few strange artifacts at times, and then for me v4 has a good interface but too buggy like most people think, just for the preview, I can’t work with it… I only have a gtx 1660 so not the best gpu faster too haha whatever, after all the passages with vai, there is always a little noise, something that I adjust with vegas pro with another filter to finalize (colors, dehalo, sharpness, grain at the end, and above all: neatvideo as the first filter!) I think that the secret to properly upscale a video is to improve it in its original resolution, the fewer artifacts there will be, and the cleaner the video will be when we will put it in HD. the most complicated thing is to improve it, removing noise and artifacts without removing details. on the other hand @akila, I will try to refine your method with dione dv, I had already tried, but I found that dione dv, dione tv etc remove a lot of details… so maybe depending on how I apply my filters with hybrid before, the details I can keep, I don’t really know!