Sorry for the delay in summarising I was waiting to hear back on a service
request about this. I'm still waiting mind - but felt that I should let the
list know my findings to date.

Original question is attached at the end of this post.

It would seem that the short answer is that it can't be done!!!

The root of the issue is that AI TIN and AV 3D Analyst are not true 3D but
only "2 1/2 D" and as such do not handle 3D solids (N.B. 3D solids are not
the same as 3D shapes or surfaces)

Thanks anyway to all those who replied especially Neil Dingle, Alberto
Antinori & Heinz Reitner, and to all the many more "Out-of-Office assistants
that also replied.

Possible solutions included:-
*       Exploding all (or at least unread) entities in AutoCAD
*       A lisp script to supposedly convert the file to something AV could
read
*       And of course a pointer to the ESRI web site.
All of these I tried but with no success but thanks all the same.


Andrew Smith
Advisory Officer GIS, Wellington Regional Council
mailto:andrew.smith@wrc.govt.nz
Homepage: http://www.wrc.govt.nz

> -----Original Question-----
>
> I want to import a DXF (or DWG) file of a bridge, from our design people,
> into either ArcView or ArcInfo to overlay on top of a 3d terrain view for
> a presentation.
>
> Trouble is both AV and AI both stop once they come to the first 3d SOLID
> and wont go any further.
>
> Have tried all combinations of 'versions 12, 13, 14 of AutoCAD',  'AI 7 &
> 8' and 'AV 3.1 & 3.2 with 3d Analyst' - no go.
>
> Is this possible?
>