Originally Posted by
funfly
VFR means just that and if your visibility is reduced to less than the minimum at any time for any reason e.g. flying into the sun or haze, then you are not in VFR conditions.
I've happily flown air experience flights in a microlight (55kt) in 4,000m haze but overcast at about 2,000ft hence no sun effect so it was uniform all round. All depends what speed you are doing.