Have you tried RadroachHD? Which resolution do you prefer—2K for performance or 4K for the full horror? Share your screenshots in the comments below.
A: You are likely running out of VRAM. RadroachHD’s 8K optional files are for screenshot artists only. Downgrade to the 4K or 2K performance version. Also, check your Fallout4Custom.ini for the line bForceUpdateDiffuseOnly=0 . radroachhd.