This is of course spectacularly re-enacted but pretty much the difference: Firestorm Black Dragon Just ignore the sharp shadows on the first picture, the difference from stock is essentially this, colors are much deeper, glow is wider, softer, everywhere, godrays, different SSAO, different shadow blurring.   I think these show the color difference a lot better: Firestorm Black Dragon Once again ignore the godrays and fancy schmancy stuf