Screen transition - Freeze the screen for a brief moment then crossfade to the new contents ( useful when switching theme )

[KAGEYAM4]

I found this when going through niri docs --> https://yalter.github.io/niri/Configuration%3A-Key-Bindings.html#do-screen-transition

Quite cool, i tried it and the transition feel so smooth. Quoting from there ->

Freeze the screen for a brief moment then crossfade to the new contents. This action is mainly useful to trigger from scripts changing the system theme or style (between light and dark for example).

It makes transitions like this, where windows change their style one by one, look smooth and synchronized.

By default, the screen is frozen for 250 ms to give windows time to redraw, before the crossfade. You can set custom delay.