I would like to have a 3D north arrow that i can add in my layout of a 3D scene
When you say that you want to add a north arrow to the layout of a 3D scene - that can already be done.
North arrows—Layouts | ArcGIS Desktop
Or do you mean the same as what is described here Set view/camera position and projection in ArcGIS Pro
If so, we should merge this Idea with that.
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