http://www.subsim.com/radioroom/show...&postcount=141
The main thing is to parent the objects to the Marking Lines group and have a "WHITE" color channel for the marks file. If you make them black, you won't see any difference. The color will multiply with the green color during the night so white turns to green and black remains black. And they'll always be black during the day. It's sort of like the contact icons for the ships. If you make those white, they'll color themselves to show enemy status (blue, green, black, red). If you make them black, they'll always remain black.