Pyromania and aura/halo effects: lighting objects on fire.. :D

I have noticed that when we use the fire effect, this works on the terrain and leaves anything that is above terrain level alone. I would like for most objects where it makes sense (not a bathtub full of water) to have a toggle button allowing me to light it on fire.
say the biblical flaming bushes, or the wickerman, or the walls of a house where the insides are on fire, and so on (ideally the flames would be customizable in colour).
Similarly, I would have a separate toggle to enable any object on the map to radiate light, identifying it as a magic item..