I only know how to do this in the theatre, and I am not sure it would translate to Vue. Softening the light, by using a fresnel spot instead of a sharp spotlight would do it on stage unless the object was very shiny, in which case you have to use a diffusing gel as well. My instinct in Vue would be to soften the fill lights a bit, or even play around with making them volumetric as well. The trouble with softening lights is that it makes shadows go noisy, but if you have the shadows turned off that should not be a problem, unless it also substitutes noisy hightlights for sharp ones.

Just a thought, and it may turn out to be a useless one.