something crazy like 15 minutes, I'm an IRL firefighter and teardown has the best smoke/destruction physics for simulating fires, the only thing that is missing is that in real life, smoke doesn't dissipate, it lasts for a pretty long time until it cools down and accumulates into soot. one of the main training scenarios for us firefighters is putting on our full gear and placing a hood over our masks and still being able to move around basically blindfolded, what this is simulating is the real blinding effects of smoke inside of structure fires. It'd be amazing if this was possible to replicate in teardown, and so far, you've been the only creator to be smart enough to figure out how to change smoke and fire effects in game.