I'm not sure exactly what Neo wants to happen in the optimization. Falskaar contains both compressed and uncompressed textures. If he wants to optimize without changing any formats or sizes then the latter figure (DDSOpt_Fig7a.jpg) is the appropriate one (It will optimize both compressed and uncompressed textures without format changes). If he wants to change all uncompressed textures to compressed then DXTx should be used as the format option for all the format choices in the Constraints tab. The first figure will change the format of the uncompressed model space normal map textures (files with names *_msn.dds)  to an uncompressed texture with less precision (R5G6B5), but I don't see any model space normal maps in Falskaar so it would likely yield the same result as the latter figure. I used the DDSOpt_Fig7a.jpg when I optimized Falskaar, but I haven't had time yet to go there in the game and check it. Ah ok, I'll use that then. But am I supposed to optimize ALL files? (as SR:LE says like 'All:8092x8092 (default)") Or only the .dds files? EDIT: I assume it's only .dds files as the program is named DDSopt, haha.