Hi eric,

> I personally like the look of objects in MoI now. I often darken the visible edge lines. On my display the hidden lines are
> lighter and thinner and that's great though I would like it if they could be dashed.

Are you talking now about MoI's viewport display? Or about PDF/AI export?

For the viewport display, the hidden lines are actually supposed to be dashed currently. Does your display look different than this? :



Those "hidden lines" there are not solid:




> I would also like an alternative where the surfaces did not have any color at all so that for
> some illustrations it would appear simply as a line drawing.

You can get this currently by adjusting some lighting settings so the lighting is so bright it essentially disables shading entirely.

Check out here for a description on how to set that:
http://moi3d.com/forum/index.php?webtag=MOI&msg=3135.3

- Michael