I've been getting a lot of requests to port my Skyrim mods to SSE, but I'm unsure of which of the new compression formats are used. Many people say my original textures have worked fine for them in SSE, but I hear of certain people having an issue. It seems that normal maps are more likely to have a problem than diffuse textures.
My question is what compression is Bethesda using for they normal maps in SSE? They look identical to the originals, both in appearance and file size, so I was unsure what compression format they used. It's not the new BC5 compression, because that uses on the red and green channels, and lacks a spectral layer. It's the only compression I see listed explicitly as being for normal maps. Would the BC3 compression work for normal maps as well as diffuse textures?
Obviously, I'm a bit unsure about these new formats. Any help would be appreciated.