Maenas, thanks for advices! Can't agree more about dark background, gotta reshoot.
Metal mostly looks ok and highlited for the naked eye, but lamps kill it outright.
I am sure that this specific miniature would have had benefit of a darker background (black, grey or even foggy brown) as it is on a "lava" environment, it would have made sense. ;)
Shadows on the red robes could be worked a little more, some parts of the base work perfectly, some others don't but you can really get the idea of a end of the world thing....
I would also work a little more on the metals specifically with their shadows and highlighs. White and black robes at the back seem pretty good to me. Keep them coming!! ^^
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