In response to post #30729645. Problem solved. You probably have whitespace after this guy "SHADERSFX\" in fallout4.ini and NMM apparently checks lines by exact matching... so it filters out your modifications to ini files %)
Can't get rid of warning pop-up "to install fallout 4 mods you are required to make some necessary ini edits (Fallout4.ini), please follow this video guide:" All ini files modified, what am i doing wrong?