[=;441653]
That would make a big time saving difference!
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Unity does that (monitors changes to file), and that is very annoying , because every time you re-save some file, you have to wait till editor editor finishes (re)importing it, before you actually can do anything in the level. If the file is an fbx skeleton with dozen animation, pause can be significant. Now, UE4 fbx import is very slow, so will get on your nerves very quickly.