Required:
Dawnguard DLC
Can be use with official "High-Resolution Texture Pack" DLC*

*seem that they forgot to convert this texture in High-Resolution Texture Pack :P

For any one that use "Skyrim Realistic Overhaul + Dawnguard" you probably don't need this fix.

Credit:
BSAopt
7zip
Gimp and gimp-dds
Bethesda Softworks

Change log:
1.0 convert seruinsmarble01_n.tga to seruinsmarble01_n.dds BC3/DTX5 with mipmap