Normal Map wont keep alpha after saving package

Macattackk

I have a normal map with a height map in the alpha channel for a bump offset. when I import or reimport the normal map, it uses the alpha channel height map correctly. Although, every time I save the package, it gets rid of the height map in the alpha channel which gets rid of the bump offset. how can I have the normal map permanently keep the height map?

Obscura

Thats really strange. Maybe something with the compression? Or something else there at the normalmaps settings? I mean "compression no alpha" for example.

Macattackk

nope, not doing that. here are the settings. its a 32 bit targa.

lpcstr

Well of course you are loosing the alpha. TC_Normalmap is DXT1, no alpha. You could use something like TC_NotmalmapAlpha, but I'm going to tell you right now that the quality of the normals is going to suck. Try separating your alpha and normals and using TC_NormalmapUncompressed for the normals, or alternatively you could keep them together and use TC_VectorDisplacmentmap. If you do that, be sure to set the Unpack Min to -1 for the channels containing normals.