Is it possible to fade between screen fixture models?

hello again, hehe i have a barrage of questions, any how one at a time. so i would like to have a fade control between changing models which i have loaded into each screen fixture. so i have say three models loaded into screen fixture one, when i swap between the three models i would like to have some control about how they change, say a fade beteen....transition between models. how would i go about achieving this? Thanks guys

unfortunately it is not currently possible to fade between models.