That's impressive, thanks for sharing the vid. The tiled pillar in the subway was cool, I don't think I've ever seen a game handle the destruction of individual tiles before with that granularity using just a shader. I was also really impressed with the billowing ripple normal map effect when he shot the sandbags and the busted pixels on the LCD street sign. It's not like those effects really get reused on other common materials throughout the game, someone set them up specifically for those few edge case object types.