I’ll chime in on the HQ-CG mode seeming to produce better results in many cases. It sure handles lines and edges very well, anything where aliasing would be an issue. Seems it handles such potentially jagged edges (step-stair appearance on diagonal lines) very well.
But then it seems to handle textures less well in some situations, meaning it smooths out fine details somewhat between such lines and edges, making some surfaces look plastic. The HQ mode seems to keep textures better, but seems to have aliasing-issues with lines and edges.
Suggestion:
Some sort of combination of the two modes might do wonders. Maybe a slider to add in textures and fine details from the HQ mode into an otherwise clean/smooth HQ-CG upscaled video would solve this. Would make it possible to have nice upscaled edges without aliasing issues, and keep more detail where they might otherwise get smoothed out.
A slider for sharpening might also be good.
Regarding the sharpening; as it is now I get pretty good results by upscaling to about 1.5X the target resolution, and then apply some sharpening and scale down to the target resolution in Premiere/AE or something.
