Well since the article basically says the same thing I did if you want the Mips maps to be higher than you crank the Preview up to 4096 so that the next Mip map will be 2048 and the third 1024 and the fourth 512.  The Mip Maps are created on the fly by Poser and use the original texture map.  Of course, the Original Map will have to be at least 4096x4096 or it won't make any difference.   But you still run into the problem the further away the object is the less pixels it will have and the texture will still be compressed to fit.  But making the Mip Map very large it may push the point where the image starts to blur.  So that if an image was 1024 to start and it looks OK up close then if you use a 4096 image and it drops down to 2048 there will still be the compression line, however, it may not be as noticeable.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13