"Impact frames" in UE5?

[TobiasTobasco]

See our thread here and this reply in particular:

Stylish cartoon black-white screen FX

I had posted this on Discord - message link here for posterity: Discord I indeed did this with a sprite as well, not a postprocess effect. https://imgur.com/7wgRwKd Higher quality: Impact Frame effect from the Discord archives - YouTube Material graph: [flash1] [flash2] [flash3] Applied to a Niagara sprite that flashes (white) color and opacity twice like this: [flash4]

It can also be done with LUTs:

Do these effects occur in the post process?

That looks like just a LUT.