What is directional lighting? The only type of light I know is the one that spreads in all dimensions the same way? :unsure:
That would be a omni or omni directional light.
In 3d you also have directional lights that have a cone shaped spread for the light, basically imagine a spotlight light in RL. That's a directional light. They are really handy for lighting a scene. And being stuck only with omni again would svck
Directional Lights, even though Gamebryo supported them at the time Oblivion was released, Ob simply could not use them, and if you did create one they simply reverted to omni
While we are here on lights, and fix all the controllers so they can be animated, again oblivion a couple light controllers simply did not function.