Hi,I've come across something I don't know how to resolve.I am filming in a hotel that has quite a yellow cast tranquil lighting throughout, not a problem. Then there is this area that has windows which let natural light in. It's a lighter area because of this, great...more light...BUT in this area I have suddenly got the banding lines?I checked my shutter speed and fps, 50fps 1/100 shutter...i thought this should be ok. I dropped the shutter a slow as i can do manually, which was 1/60....this helped but doesn't eliminate the issue. When I moved back to another area that was actually dimmer....the lines go away. What's odd is that the artificial lighting was the same throughout the hotel...only when the natural window light came into play did this happen?Has this got something to do with the mix of lighting....the artificial hotel lighting and natural light from the window? What is there left to do on a DSLR to tackle this issue? I'm using Canon 5D mkIII. Is there a setting on the camera to help with this. White balance didn't affect anything.I didn't think this was an aperture issue as when I stopped down it didn't make any difference to the banding. Similarly, it had nothing to do with the volume of light as the darker area in the hotel was fine but this lighter area caused the issue???Any help would be appreciated as we are shooting a wedding in 2 weeks and iv'e not come across this before.ThanksMartin