[mr.DIMAS]

Ну кагбе тут разжевано

http://www.gamedev.net/topic/296413-...render-states/

3) D3D does contain its own internal redundant state checker for non-PURE devices. So when you set the same state twice in a row, that warning message is it's state checker telling you. For that reason, unless you're using a PURE device, a redundant state checker in your own code is only truly useful if it can do it on multiple chunks of state (you can use application specific knowledge here).

Подтверждение тут

http://msdn.microsoft.com/en-us/libr...=vs.85%29.aspx