Hi niko - to untrim in MoI you need to select all the boundary edges (which must be unattached to other surfaces, use Edit/Separate if necessary to break a surface out from its joined neighbors to be an individual object) and then hit delete.

If you select one edge of a surface, you can also use Ctrl+A to select them all instead of manually picking them.

There's also a tutorial available here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=446.17

which covers that much more extensively. That's about how to repair a boolean that was done in the wrong place.


I think this was mentioned on the other thread as well, but just to make sure - you can use Copy/Paste to share objects back and forth between MoI and Rhino. So if you need to occasionally use a tool that is only in Rhino and not MoI that can be a pretty effective way to get things done.

- Michael