I noticed last night that when I went to an external view while flying that my plane was "releasing" a large quantity of black squares/blocks. The vapor trails from the wingtips were also very black and blocky. I later saw another plane fly over up in the higher FL's and noticed he was leaving a nice coal black line across the sky. I'm certain that I have changed something in the effects folder, but have no idea what. Any assistance will be appreciated.
I'm not a real pilot, but I play one on FSX.
Kevin



