How to disable Cascade opacity when a sprite use BlendFunc?

cocos2d-x C++
1

Hi.
I have 3 sprite: sprite1, sprite2 and backgound. I set BlendFunc::Additive on sprite1 and sprite2 but i dont want two sprites additive blending with background.
How to do it?
I just use setCascadeOpacityEnabled = false and setCascadeColorEnabled = false for all sprite but nothing change.

2

I still being searched for one solution.