Just in case someone needs this info, to convert a lot of dds files / textures from Skyrim LE to Skyrim SE format: You need xtexconv.exe which comes with the construction kit and is in steamapps\common\Skyrim Special Edition\Tools\Elric if you need to convert a lot of dds files in many subdirectories, there is no real shortcut, but a bit of a workaround: Copy xtexconv.exe and xg.dll to the textures folder with all the subdirectories you want to convert the textures from Open a DOS prompt write: dir *.dds /s /b >convert.bat Open the convert.bat in any text editor (I use TextPad) which can use regular expressions for replacement. 1. Replace .dds with .dds" 2. Replace the drive letter with xtexconv.exe -o "<drive letter> like this: D:\ with xtexconv.exe -o "D:\ 3. Duplicate the filepath, search for ("D:.*") and replace with \1 \1 4. To strip the dds from the path after the -o search for: \\[^\\]*" " (searches for a \ not followed by a \ and followed by " "), replace with " " save the convert bat and run it from the dos prompt. Enjoy your game For all other issues, I recommend using Cathedral Assets Optimizer