Originally Posted by SRoper

I suppose a case can be made from Deut. 4:15-18 that making such an image would be OK:

"'Therefore watch yourselves very carefully. Since you saw no form on the day that the LORD spoke to you at Horeb out of the midst of the fire, beware lest you act corruptly by making a carved image for yourselves, in the form of any figure, the likeness of male or female, the likeness of any animal that is on the earth, the likeness of any winged bird that flies in the air, the likeness of anything that creeps on the ground, the likeness of any fish that is in the water under the earth.'"

I think it's fair to say that the burning bush was not a likeness of God, so it can be depicted in art.