I should add, that the source for an IBL does not have to be a light probe. Any image will do. You should have the light source in the shot. A nice panoramic sunset would probably work fine for a scene where the subject is supposed to be facing the sunset. You might want to photoshop a dark rim so the figure won't be too back lit. The map I posted at the top of this thread will be helpful for photoshopping an IBL source. Nerd3D