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  1. @BohThanks for the comments, yes they are helpful. A 3d polygon *is* a 3d polyline, isn't it? Or are there two separate types of object? As you'll see from my subsequent post above, I worked out what was going on with my polyline/polygon, it unintentionally had different z-heights at the vertices, so was like the red one in your examples. I've realised that when editing the source data, it's possible to look at it in a 3d view (frustratingly not able to e save as a saved view) which is a good way of checking things when unexpected results are happening. I've played around a bit with using 3d polylines as edges as you suggest. I wondered if placing two of them, one directly 100mm above the other, would allow me to create a vertical kerb edge but that doesn't seem to work.
  2. After further investigation - I found that it was a 3d polygon that had somehow ended up not parallel to the ground plane - so its vertices were all at different heights (I was just looking at the object height in the OIP). So that explains it.
  3. Looks like that tool lets the top rail be below the top of the vertical pieces which is also handy.
  4. It's not necessary for the fence tool as it maintains a constant height, unlike the wall tool.
  5. It's a 3d polygon. Interesting, I will have to experiment with this.
  6. To illustrate what I mean about the generated contours not matching the contours I give it, see this screenshot. The line highlighted in orange is a polyline set at 2000, but you can see in the light green generated contours that the 2000 line deviates quite a bit from mine (including at the vertices). On the other hand, where I've placed loci, the generated contours pass through them exactly.
  7. My workaround was to project a polygon down to the site surface, then draw the fence snapping along its bottom edges.
  8. Yes, that would make life a lot easier and would seem like a fairly obvious functionality to provide.
  9. Not quite sure what you mean by the whole line... do you mean you use a 3d polyline with varying Z height to define edges?
  10. The method shown in that video is not very useful, because in most cases you want a fence to follow a line determined in plan view. You need to be able to project that line onto the surface of the site.
  11. OK...after some more fiddling around, I've got it to work with a polygon but by using the 3rd and 1st (or 3rd and 3rd) modes. So, it's something to do with the "normal" of the profile plane. In fact, I now find that it depends in which direction I draw the polygon (clockwise or anticlockwise) So does VW create a circle with a normal that's opposite to the one it creates a rectangle with?
  12. Attached to this message. VWproject.vwx
  13. Tried changing mine to mesh, but behaviour remains the same (circle will project but not polygon or rectangle).
  14. No, it didn't like that either
  15. Hm, this worked fine with a circle (and an ellipse) but it doesn't seem to want to do it with a closed polygon or a rectangle (I get a "project tool failed" error message).