I just can't find it in AC2008 - how do I make the lines hidden from the current perspective to appear dashed (or other color or whatever)?
I tried tinkering with HLSETTINGS and OBSCUREDCOLOR but nothing happens in both 3D wireframe and 3D hidden modes.
It's tricky. 2008 may have an improved interface for doing this, but I'm not aware of it. Traditionally, judicious use of the SOLVIEW and SOLDRAW commands can produce the desired result - but it can be extremely fiddly.
I can't remember off the top of my head whether or not you can assign dashed linetypes to 3d objects. If you can, you might find it easier just to plot a paperspace view to pdf twice - once with HIDEPLOT set to ON, using a continuous linetype, and once with with HIDEPLOT set to OFF, using a dashed linetype. Once plotted, it would be fairly easy to combine the two views in your favorite graphics package. That's actually how I do it - but I don't use dashed lines. I just make the 'hidden' lines fainter in photoshop by adjusting the transparency of that (photoshop) layer.
Good luck.
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