> Also, on my other computer I noticed that OBJ export is some kind of
> "all or nothing". If the slider is put to the left, I've a low poly version.
> Then if I drag to the right I've a high poly version but no gradation
> between the two. The file size and the number of polygons is the same
> when I export an object with the slider at the middle of the bar or if the
> slider is at the extreme right.

Yeah, the problem here is the way that meshing works - the basic approach is that a smooth surface is continually subdivided into two pieces (repetitively) until each piece matches some kind of tolerance.

So things come in kind of "chunks" - once a surface is split, the new smaller pieces will often times be within a much tighter tolerance so they won't subdivide again until the tolerance is reduced by quite a bit more.

Eventually I should be able to improve this by doing some initial forced subdivision of the surface into more than just 2 pieces at a step, but this may take a while.

- Michael