Removing polygons/vertices from mesh

[Lroy]

How is it possible to edit mesh (runtime or not)?
Void Object3D.addTriangle exists, but no delete/remove triangle found.

[EgonOlsen]

No, there is no delete or remove. But maybe there's another solution, so what do you want to do that requires this?

[Lroy]

I need it for demo purposes, so performance is no very important for now. No textures are used for simplicity sake. It will be ok, for example, reload all mesh or just hide some of triangles (for example, I would like to remove all triangles, containing single random vertex). Also, is it possible to split source object to some pieces?