Well, now I've added the flames to the head, on a separate layer from the body and It makes the painting really come to life. Some of the highlights and shading starts to make sense now that you can see the source for some of the lighting. Originally I was going to going to keep Hellspont's skull solid black as they have in the comic books, but seeing the flames on and around the skull like this has changed my mind, and I'm going to leave as is. This painting is close to finished, but there's still a lot of work to do on the wrists, hands, knees, abdomen, and Hellspont's shadow on the ground.

Here I've now added in the frontal tubes, their segmented texture, and the shadows they cast, along with the smaller flame on the chest. You can also see where I repainted part of the cape (over the shoulder on your left) so the tube will go under the cape as it's supposed to.