I have been working on a retex of an armor set. Now I have the main texture done and have gone to make a new normal map. I am using gimp 2.6.11 and the latest normalmap and dds plugin I can find. My problem is that while making the normalmap you can choose the the 3d preview and usually choose the sphere or teapot and drag the lighting around. However, when I choose the 3d preview with a skyrim dds the preweiw window is blank or just filled with white. So I cannot rotate the lights on the texture.

Also would like to know the compression skyrim uses to save as.