Ganfraus, thanks for posting.
First, unless you specifically need NURBS (most people don’t), then it isn’t necessary to create the object the way that you did. Instead, you can simply load the “sphere_64.tga” sculptmap and then ‘Edit Scene’>’Paste into Scene(sphere)’ and left click in a viewport. This will create a sphere in 3ds max that can be used for making sculpties. The “sculptmaps” folder that comes with SculptGenMax contains other sculptmaps that can be used as a starting point, too. See “How do I import a sculptmap into 3ds Max?” and “Where can I find pre-made sculptmaps to import?” in the installation notes as well as “How do I create a sculptie-compatible object in 3ds Max?” in the FAQ for more details.
Also, in your rendering preferences, uncheck “True Color” as described in “My sculptie looks deformed. What should I do?” in the FAQ. This could be what is causing the uneveness in 03.jpg
As to 01.jpg, it looks good. I don’t know what you mean by “very poor color range”. If you are referring to the fact that 02.jpg looks much smoother than 01.jpg, then it isn’t important. In a 256×256 sculptmap, only 1 out of every 64 pixels is actually used. So even though 02.jpg looks better to the human eye, it isn’t necessarilly better as a sculptmap.
But you do have some small problems as evidenced by 03.jpg. My best guess at the moment is that this will be fixed if you uncheck “True Color” as described above.
Give it a try and post again if you are still having problems. Hope this helps.
–Shack