Since two or three month I'm building a Titanic Model in Blender 2.74. I'm using Cycles Renderer and a GTX750TI for rendering.
On A-Promenade I built the Windows with a Diffuse-Material for Frame, a Glas-Material for (guess what!) the Glas and an Emission-Material on the Backside of the Window. This works pretty well and makes a nice light on this Deck.
But I also need some white light from Lamps so I built these Lamps in a Diffuse- (For Frame) and an Emission-Shader (For "illuminated" Glass) but I get no light from the Emission of the Lamp-Material.
When I turn off the Emission from Windows the whole Deck is black (except the Faces themselve). Even if I set the Strength from Lamp Emission to 100000 or more there would be no light.
I don't want to add a Point-Lamp for every Lamp I built so what else can I do?
Here's the simplified .blend File: