Each frame, Ogre determines the lights which could be affecting the frustum, and then allocates the number of shadow textures it is allowed to use to the lights on a first-come-first-served basis.

• 不过这样做只有在点光源在视截体外面的时候才能正确的工作，所以并不是一个真正完美的解决方案，并且而外的这样做还会带来一些纹理的“抖动”。