Check your world Outliner, you should see another post process volume, usually named GlobalProcess (or something like that, just type “global” in the outliner) and delete it or disable it. Alternatively, before exporting from 3Ds Max, disable your exposure controls. The Global Process volume that is imported from the datasmith importer is because of enabled exposure controls in 3Ds Max. At least that’s what I think it is, because I notice that when I export and have exposure controls disabled I dont get the extra post process volume imported in UE4.
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