Hi McNeel Is there a way to either a) invert the sub-object selection of an object, eg. using Lasso to select some faces on a mesh or sub-d and then inverting that selection? Or b) make it possible for SelBoundary, Lasso etc. to recognize if a selection filter is active. What I’m looking for spec…

at the moment, this is not possible, but I’d be curious if @pierrec has any ideas on how to do this-

a) Not possible currently, but maybe @BrianJ has a solution coming up in his selector plugin? RH-98496 Subobject selection: Have a way to invert a subobject selection b) Lasso, SelRectangular, and SelBoundary both already work with selecting subojects / selection filters. They also both have a Inve…

great and thanks @pierrec i wanted to point exactly to the same issue _selBoundary + InvertWindow + Selection Filter… hopefully this can be fixed. workaround: sub-Select beyond the blue circle: [image] do a fake closed curve with a minimal gap ( make it document tolerance * 2 or * 10). just fo…

[image] Tom_P: do a fake closed curve with a minimal gap ( make it document tolerance * 2 or * 10). Love that creative workaround! [image] Tom_P: empower named selection Cool ideas, I’m investigating where the implementation stopped.

Hi @Normand , Does SelFacesToBoundary help? [image] [image]

Hi @BrianJ Thanks for the suggestion, but not really. It’s usually working with scanned meshes, where clean topology that lends itself to chaining selections is not really a thing :joy: A typical situation would be using lasso to select a small area and using Smooth to, well, smooth out a particul…

[image] Jakob Normand: I’d love a InvertSubobjectSelection command. i would love to see those logic AND; OR; NOT; … … which would basically be a SubSelect-All NOT MyNamedselection this would be a more general approach (and then maybe a InvertSubobjectSelection would internally rely on the …

Hi @Tom_P I agree - and what I’m looking for would be easily scriptable with a temporary named selection. Basically anything that would enable modifying subobject selections beyond manual add/subtract would be nice :slight_smile: -Jakob

Understood. I added a note to the request Pierre filed above. It might make sense as part of Invert. Named Selections work on this scale would be in the v10 timeframe I think. I filed the named selection Booleans requests as https://mcneel.myjetbrains.com/youtrack/issue/RH-98678

Invert sub-object selection or SelBoundary with Sub-objects

Rhino

brian (Brian Gillespie) September 29, 2026, 10:21pm 11

RH-98496 is fixed in Rhino BETA

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Invert sub-object selection or SelBoundary with Sub-objects

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