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Wow, some of the new features are SUPER amazing. On the right you have a single texture sheet. On the left you have that single texture sheet applied to a mesh. It automatically finds the closest fitting size of a "panel" and fits the rest. Single press of a button and you have a perfectly aligned texture for any complex shape. Something that used to cost a ton of time. Wow.
Another great one is just creating simple brushes and then the engine replaces them with pipes/catwalks/girders automatically and intelligently (accounting for corners and stuff), then you can randomize different bits so this one is rusted and this one has a vent in it etc