Screen position out of view frustum

Screen position out of view frustum (screen pos 512.000000, 0.000000, 100.000000) (Camera rect 0 0 512 512)
UnityEngine.Camera:Render()
MirrorReflection2:OnWillRenderObject() (at Assets/UnityChanStage/Visualizer/MirrorReflection2.cs:118)

在用unity3d调优时，遇到了这个，后来查了下，是因为参与镜面反射的camera,的近剪切面的值太小了，一般远剪切面与近剪切面的比是要小于1000，不然精度会下降。