The fire belly from the Ogre Kingdom faction of Warhammer gives the painter an excellent opportunity to use object source lighting. This is a method of painting that gives the impression that part of the model is illuminating other parts of the model. In this case it is the fire issuing from the fire belly's mouth.
After painting the model I used the yellow wash from to highlight the areas where I felt the light from the fire would be most intense. The face plate and the belly plate, being metal, would give a good reflection of the fire. The top corner of the hammer and even the top edge of the sword all had the yellow wash treatment.
To indicate a harshness light source I exaggerated the creases in the skin of the ogre to imply shade away from the light.