I totally forgot about these photographs until I stumbled across them today and remembered I never did work out quite what was causing the rainbow like haze in the distance. It’s not camera related as I could see it with the naked eye, does anyone know what could be causing it? I’m guessing it’s just the approaching rain & storm clouds causing a low rainbow effect, but I never seen it quite like this before. You can see in the next photo along that the rain clouds were very close, within about 30mins. Pretty cool though! Location is Koh Yao Noi, Thailand.