The closest way you can implement something like this is with viewport frames. You can repeatedly clone the parts into a viewport frame that flashes transparency like that, but it’ll likely be low in performance and resolution. I don’t recommend it.
Hey, thank very much for your respond. But I didn’t find ‘cooldown’ of capturing screenshots, can you please explain us what did you mean about ‘cooldown’?
It’s evident by people using the API that capturing on every frame/heartbeat is not ideal. In one way or another, the captured image is the same in a 1 second timespan. I’m not sure exactly how, though. It could be yielding, erroring, or caching the image. So currently, it’s not possible to do the effect, but it may in the future!