Test I’ve made while waiting for Eevee and trying to get the most of the real time graphics in Blender 3D. Because I really have no time to wait for some simple effects generated by the Cycles engine.
What I need is an optical accuracy and not the phycical correctness
Same as a real world artist painter. Fortunately that Eevee engine is gonna target that issue. So here I just used the material mode in Blender 2.79 to mix the Cycles Principled Shader with the OpenGL lights. It’s basically the same technique Eevee gonna offer.