Hi Peter - I see... In that case I would recommend these steps:

Start with one petal:



Use Construct / Offset and draw 2 lines + join them to make a thickened curve:



Now use Transform / Array / Circular:



Then select all these pieces and run Construct / Boolean / Union, that will fuse all these closed curves together, resulting in this:



This can now be selected and extruded:



If you get a more chaotic situation with quite a lot more pieces crossing over top of each other, then you may need to use the Trim method that I described earlier to finish up the 2D outline.

Basically any time that a boolean can't figure out how to finish your piece, you should be able to accomplish it by using Trim instead (with some more labor involved for picking the pieces to discard).


But definitely with a complex thing like this, I would recommend focusing on producing a full 2D pattern first, and not getting into 3D until the 2D pattern has been all completely finished up.


> Would be nice in Moi 3d V2 to see a merge option upon export (obj. format)

By luck I just happened to post an OBJ merge utility just a couple of minutes ago here: http://moi3d.com/forum/index.php?webtag=MOI&msg=1499.3

- Michael