bug with crash, maybe hidden faces or normals

[Extrudeface]

It is not too hi poly, IMO did not seem a case of 'overload'... But who knows . The model has 2681 polygons.

Sure. I just asked because with hi poly counts sometime we get strange behaviour. Also, because to try reproduce the situation is a good idea use similar conditions.

Anyway, today I had some time to try it and we really have a bug for this situations where we have hidden faces. I should say that it's my fault, since I added the "edge influence color" to Tweak.

As a workaround you can access Tweak Preferences dialog and disable the option Show Magnet Influence - something that was suggested by Fonte Boa (if I'm not wrong)

Aha, I see now. Anyway, that is one of the many things that I like of Wings: The other day solved my issue just using magnet mask locks instead of hiding geometry , very easily . Could work on an isolated part, no issue. But I have just checked that setting toggle for magnet influence. IMHO, your feature is cool, as you see what is affected of the geometry while dragging, and in some cases I trigger alt key and wheel without releasing anything, if I see it is taking more verts than I wanted . I will leave the feature on, as knowing when the issue can be triggered, I will just avoid that very specific situation using locks for now, or deactivating in specific moments.

( I have a very handy key to access tweak prefs all the time, as the selection painting and older methods I need them as often as tweak magnet )

Thank you very much, both of you.