http://cube.ign.com/articles/436/436877p4.html
IGNcube: More technical stuff - again. Sorry. Please confirm exactly what you´re doing? Bump-mapping, shine-mapping, dirt-mapping, lighting effects, shadowing effects, etc.
Denis: We have a unified lighting pipeline which means that we have a hardware light that lights dynamically the background and the characters at the same time. That´s the technology they were talking about for the new Doom title. We also have some pre-lit stuff. So when the character goes into some darker areas he´ll get dark, but at the same time as the camera moves around you´ll see lighting effects on the background as well. In our opinion, it looks pretty nice. Bump-map, shine-map, yadda, yadda, yadda - we do it. I don´t think there´s anything we don´t do, that I´m aware of.
Metal Gear Solid utilisera des techniques d´éclairages analogues a celles de DOOM3.