No ambient value for lights?
In every 3d modeling program I've ever used, there were at least three light types: diffuse, specular, and ambient. However, although I've found several tutorials on how to add even lighting for a scene (3-point lights and all), I'm wondering why there is no ambient light or an ambient value for any of the existing lights. (Ambient light being an even, omnidirectional light source that provides every polygon with at least a minimum amount of lighting value, for those who may not be familiar.)
Am I missing something? Is there a hidden control somewhere that is disabled by default? A setting outside the of the normal "parameters" tab? Adding multiple distant light still tends to give a somewhat uneven lighting level and adds to render time, which is why I'm trying to avoid it for now.