@Dragon King. Thanks for the info. I have 16GB of main memory and 4GB of vidram (GTX 980). I am not looking to reduce as much properly generate all mipmaps. Meanwhile, I can handle fairly low FPS and still enjoy gameplay, since I also use GSync. My concern is smoothness of play (@2k monitor resolution), which seems to be greatly aided by using DDSOpt to ensure all mipmaps are properly present (which by bumbling experience, ie, going by stuttering before processing and smooth play after, seems a common issue), and then choosing a good trade-off between resolution and performance. The settings I already mentioned, leaving uncompressed at maximum and using 1024 for compression, seemed to be sort of just what the Oblivion game engine ordered, while delivering a sharpness that seemed better that even a higher setting for compression. I am going to try mostly or all lossless on an upcoming test install to check performance, now that I can isolate the impact of textures alone, after having recently refreshed my recall of how to set up the crash, fix, and memory tools for stability. My takeaway for the moment is that I can dump all my textures pretty much through DDSOpt, and it is confirmed that face/body are a case apart, best left untouched (there are some parallax alternatives around, which I'll test in isolation, choosing the *_p.dds filter option, iirc). In the end, it was the Skyrim guide that sort of knocked me off kilter, thinking there might be more to do in Oblivion than what I'd understood to be the case before. Nice to get some reassurance on the matter. Still, the detailed settings found in the guide, and your feedback, have already improved my use and understanding of the tool, which is great.