- These pictures had to be taken in dark to create the effect, the camera needs to have a slow shutter speed to let more light in. It required two or more people to create the effect so one of us needed to take the picture and the others to make the light movement with the torches. I had a fun time taking these pictures they have a great effect. The only downfall was that they had to be taken at night and the torches have to be constantly moved so the exposure was correct and there was a clear line of light.