I would be interested in what alternatives people would suggest.
It can be anything. An obvious effect would be to make the model glow. It could be a pulsating glow, to attract more attention. Glow colours could cycle for more contrast. The model could grow in size for a second and then change back. A spotlight could appear, pointed at the object or character.
The way selected objects or objects of interest are shown could be made tweakable in the menu, using buttons and sliders.
It can be anything... Just do
not use the projection of the outline of the 3D model on the viewing plane. It is the king of bad ideas.
