Does anyone know what these white lines are in my images

[danz]

These raw images shot on a sony a6000, with a 50mm lens, this is a screen shot zoomed in from lightroom. Please help, what is causing this, its not in all the images from this photo shoot only some of the more back lit shots...

 

[Braineack]

what happens when you export? i have a feel it's just your screen in LR for some reasons.

 

[danz]

mmm finally found something on another forum, it looks like its probably sony a6000 sensor banding issue. Had the camera a while first time its cropped up... annoying : (

 

[The_Traveler]

post a jpeg

 

[KmH]

Check out 'pattern noise'.

The couples faces are badly under exposed because no fill lighting was used to balance against the back lighting.
Under exposure enhances all the various types of image noise.

 

[The_Traveler]

My guess would be that, if these pictures were well exposed, that pattern disappears.