Brightness

[AeroSujan]

dear friends
among ambient,diffusion,specular and emission which one is responsible for brightness of the surface. Please tell me someone. Thanks Sujan

[BionicBytes]

all of those terms are used to control the lighting of the material you are rendering.
If you just want to see more of it, then ambient is the one to tweak - so that even if the lighting is low, you'll still beable to see your objects.