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Is there a way of exclude some geometry from global-clipping?

I have a complex scene which has a lot of objects and materials, and I want to add clip-plane to this scene, I know there are two ways of add clipping, global way is by renderer, and add all these planes to materials clipplane, this is local. because I have a lot of objects and material, iterate all the materials to add these clip plane is a time consuming task, but if I use the global clipping plane, then the TransformControls of those plane will also be clipped, so I wonder if there is some b…

According to the above .traverse is a method for scene. I can’t find it in the documentation.