Step #17 in the One Day Morrowind Modernization list
C:\games\OpenMWMods\Landscape\LandscapeRetexture\Bloodmoon Landscape Retexture
C:\games\OpenMWMods\Landscape\LandscapeRetexture\Landscape retexture Normal map parallax
2K main file, the optional
Bloodmoon Landscape Retexture file, as well as the optional
OpenMW Normal map and Parallax patch file. Rename the folder from the normal map/paralax file from
Landscape retexture Normal map & parallax to
Landscape retexture Normal map parallax; OpenMW will chop off the
& in the cfg file if you don't, causing them to not be used.
Note that Tyddy's Landscape Retexture is listed as an alternative to this, but it can compliment this one (providing many textures this does not).