I've been seeing editors use this kaleidoscope/mirroring effect, where they zoom out of their original compostion and zoom in (the mirror not being a part of the original comp, sort of like cc repe tile). I was wondering whether this is a plug-in and how to achieve this. Here is an image:
Please ignore the zooming, but it looks like this. Thank you!
just a combination of effects like CC Repetile indeed, oversized images, cropping and smart invisible transitions.