alt Hacker News>You also don't seem to understand what that example shows
I do understand, and this is exactly what I consider weird. Instead of repainting (in any way, even what is considered pleasant by you and Nikita), I'd prefer blur/mosaic/white window during the animation. Not the motion blur, but just not the actual contents of the window! This breaks "every frame is perfect", you can't make a meaningful screenshot of this transaction.
In KDE's Kwin, I configure windows resizung using crude stretching algorithm. This means I see non-proportionally weirdly stretched window several frames, then it repaints. On screenshots that looks really weird, while in reality this is quite ok.
> On screenshots that looks really weird, while in reality this is quite ok.
That wasn't the criterion, which was "the best"
> very possible that a "wrong" frame in isolation is the best looking one in a real-time context.
So show your Kwin animation example and explain how it's the best due to "human vision" compared to a transition without the weird stretches.
> I'd prefer blur/mosaic/white window during the animation
You mean blur where no content is visible/readable (that's different from the animation examples where text is visible, is moving, just not crisp)??? That's another reason you should just answer the initial question directly and provide a UI animation example supporting the theory instead of keeping arguing with nothing to show for it.
And again, what features of "the human visual system" does white window exploit that makes it the best?