I've never done this in CommonWealth Worldspace so make a copy of your esp before you start, precombines can make a mod a little screwy. FO4edit/Worldspace/Block/Sub-Block/Cell. Delete: VISI-PreVis Files Timestamp RVIS-In PreVis File Of PCMB-Precombind Files Time Stamp XCRI - Combined References Redo precomb/previs/vis for cell This may cause some occlusion error, sprint bug etc., and you may not need to delete all references groups, but def XCRI.