hrm, there's something about the lava that makes it look way too flat, all those creaces and details make it look like a flourescent tree bark instead of thick rapidly flowing incandesent lava.
Are you consciously trying to make this unrealistically bright? I thought you were going for an incandescent rapidly flowing lava. like this
http://www.wainscoat.com/lava/flow.jpg http://www.wainscoat.com/lava/large-flow.jpg But now that you add all these creaces it makes me think you might be going for an dark slow solidfying lava. like this
http://boris.vulcanoetna.com/gifs/image/110399_09.jpgI'm gonna assume you're going for incandescent lava instead of dark lava.
I think the basic aproach you had two posts ago was better for this, it seemed like it was color coded by the amount of flow.The fast moving parts were bright and the slow ones were a little darker. I think if I were you I'd go back to that concept and add some shades to the dark parts
http://www.wainscoat.com/lava/toe.jpg somewhat like this kind of effect
If you are not planning to animate the lava, you could be to blur it with smoke
http://www.wainscoat.com/lava/large-flow.jpg so that you have a good reason to not detail the lava itself, which would lead you to animating the lava.
http://www.wainscoat.com/lava/silhouette.jpg http://www.wainscoat.com/lava/steam.jpg plus those incandescent steam clowds just look way cool, and they would help make the ambience more complete =O
http://images.apple.com/ca/pro/profiles/lanting/images/gallery4.jpg Amazing looking river of lava, it IS a photo believe it or not.
http://www.volcanovillage.com/Kilauea_Volcano_Photo_Gallery_3/Kilauea_Volcano_73102_OverLavaRiver01.jpg http://boris.vulcanoetna.com/gifs/image/130399_04.jpg http://boris.vulcanoetna.com/gifs/image/110399_17.jpg http://hvo.wr.usgs.gov/kilauea/update/archive/2005/Nov/20051130-0361_RPH_large.jpg http://hvo.wr.usgs.gov/kilauea/update/archive/2005/Nov/20051130-0361_RPH_large.jpg http://boris.vulcanoetna.com/gifs/image/110399_10.jpg some slightly diferent looking rivers of lava
Also, I dont think you should use the shades that are exclusive to the lava so much on the surrounding rocks, it kinda deminishes the charm of that neon looking lava. If I were you I'd try a completely diferent pallete for the stones behind the lava..
http://www.volcano.si.edu/volcanoes/region02/red_sea/ertaale/2612ert3.jpg See this picture? pay no attention to the thin stings of lava, look at the incandestent color of the lava below, and how good it looks in contrast to those earthly reddish and gray stones.
http://serc.carleton.edu/images/quantskills/methods/lava20021122.jpg you could put parts like this on the edges if you want some dark lava on and some incandescent lava,.This dark lava looks so clearly solidified you wouldnt have to animate it.