Basically i made retexture mod for game and main texture is in .ubulk format, which is no problem convert to .dds and back, but second file - .uexp still holds default mip maps, so original texture is still visible from far distance
File example is added, so if someone know how to edit/fix script.. or have any ideas, it would be great.EDIT: Solved - i just used Unreal Engine 4 Editor for creating my own .uasset, .bulk, uexp files..