I found to get rid of the deck gun halo just delete these 2 files from the mod
C:\Silent Hunter 5\MODS\Environment 4.5 MOD\data\Textures\TNormal\tex\expl_hallo.dds
&
C:\Silent Hunter 5\MODS\Environment 4.5 MOD\data\Textures\TNormal\tex\expl_hallo_add.dds
That got rid of the artifact but left everything else intact.
W_Clear, I hope you don't mind the tweaking of your mod. I do love everything you've done, it was just the deck gun halo that didn't seem to fit. Thank you again, very awesome mod