I've been trying to do research on the decay rate at which stuff starts looking like it's a hundred, and falling apart, but a brief attempt at a google search only gave me results for mostly articles about Olympic venues that have been abandoned. Which is nice but not exactly what I want. I suppose what I need are either some answers here, or a better question I can ask google. My brother and I are modeling a small neighborhood (in 3d) that should have the appearance of being abandoned, but I want it to look fairly realistic, in terms of wear and tear. I suppose it depends on the building, and the building materials, and the things inside, and environment. So, at what point would a neighborhood look like it had not survived a war, from simply just being left there?