>>718183367
it wasnt, this was made using what would become fox engine used in mgs5
this game was cancelled as the devs had 0 idea what to do with the destruction gameplay wise
platinum games used their own engine for their games, so it dosnt have the same destruction system
also this was a live demo at tsg in 2010, they did the presentation in few variations
as to how they do the complex unwrap in real time? probably just duplicate mesh, offset, use that to do a second boolean, split in two ids
its era when game models were 50-100x less dense on polycount than today, guessing also making sure the gpu isnt waiting for the operation to finish and instead allowing it to lag behind, simple stuff