Hi NightCabbage,

> Do you mean to draw the lines hidden behind surfaces?

Well, it's more about hiding those lines so that only the ones that should be visible are shown in the 2D drawing.


> (is that a problem at present? you do it in the interface,
> with the dashed lines)

Yeah, but that hidden surface removal is happening at a pixel level using the video card's z buffer.

Generating vector output with actual curve data (which can then have line styles applied, etc...) instead of only pixel data is a somewhat different thing.

- Michael