the lights object array
可选
recover: any[]the queue for recovery
light object
revert array
可选
rt: RenderTextureRender target (mulitply mode)
可选
rtAdd: RenderTexture可选
rtSub: RenderTexture设置材质参数
render target
可选
rtAdd: RenderTexture可选
rtSub: RenderTexturemesh object
array index
array index
the lights object
mesh object
array index
每一层用于渲染光影图的资源