In EU, UK and US....you MUST retain VLOS. Not see it on the map, not the general location in the sky. Visual, the term self-defines. If you are flying and can't see the drone, you are in the wrong and in an unsafe situation.
Today I was in a hilly location in Italy. There was a bit of fog and low clouds. I took off and I noticed I was inevitably going into fog banks, I was a bit scared cause I couldn't see very well on the screen but still took some cool shots of the foggy landscape. I'm just a little worried about the effects that the humidity of the fog could have on the drone.
But for now, here's just some cool shots. What do you think about it?
Video: