Well actually it can, though only as a compositing process. You would need the two seperate renders, then you can open them in Photoshop or any other image editing software to composite the two....other than that I believe adl has explained it
Red bellows of flame have blackened my stones
Convulsing my frame and cracking my bones
Hell's dragons of steel who roar in their chains
Crawl into my caves to suck out my veins.....
-The Mountain P.F.M.