overlaySKScene & blendmodes

Hi, I wonder if anybody of you faced the same. When I build my menu HUD in sksprite scene and use it in overlaySKScene of SceneKitScene, the blend modes seems have some bugs. Alpha is behaving as expected but screen/add blending don't work.. at least to me.. Works well in the editor though, see the picture. I guess it may be problem of contexts. When I use either SceneKit or ARKit, the background is either from camera or my SCeneKitScene.. rendering pipeline doesn't work with the pixels from those different contexts. Wny workaround?


overlaySKScene & blendmodes
 
 
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