"The Day After Tomorrow", Border Crossing (2004). As the global storm wreaks havoc over the United States, refugees flee to safety over the border into Mexico.

The footage was shot in El Paso, Texas on the Rio Grande river and you can see what it looked like before in the picture below.

When we received the shot we were asked to fix a number of things. Primarily there were just too few people in there. The shot needed to have a real sense of chaos and urgency about it but with the big gaps in the crowd you just didn't get the sense that a major disaster was in progress. CG people needed to be added into those spaces in order to bulk out the crowd. Secondly, right in the middle of the shot there's a group of the D.A.T. crew sitting with a smoke cannister trying to add some atmosphere in there. Sorry folks - it's just not cutting it ... you gotta be removed. Finally we needed to add an overall CG snow effect to the shot, plus do color correction to make it look all chilly and cold.

Border Crossing Shot - Before