Hulkbuster Multi-pass Compositing + set extention Inside Nuke

So in this compositing shot, I composited the render passes of hulkbuster & the challenge was to remove the sky from the passes because sky & illumination passes both rendered together so it was little tricky to copy the alpha, but anyways I figured it out 🤘. And after removing the pre-sky, I made my own sky set extension with the help of HDRI & making some basic matte painting of buildings 🏢 and added some helicopters to the shot to make it look more dramatic & to feel like something is going on or about to happen.
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the work was lot more than what the breakdown shows :p but i enjoyed it doing!
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Watch the Breakdown - https://youtu.be/wIXuHsWBMP4
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Please comment your feedback 😊