Basically, motion blur occurs on film because the shutter is left open for a certain amount of time, allowing light to pass through onto the film. While the shutter stays open, any movement during that brief moment is recorded onto the same frame of film causing motion blur; why am I telling you all this? On film cameras, the shutter is actually a pair of rotating semi-circular discs that lets light through as they spin around. The disc are positioned together so that they don't form a complete circle, leaving a gap so that as they spin around, light can break through onto the film. The larger the gap, the longer the film is exposed and, you guessed it, the film contains longer blur streaks. Typically, the discs gap is 180 degrees in size meaning the frame is exposed for half of one complete rotation. Since the disc rotates once every frame, the light is let through for half of a frame. All this means is that the frame duration for motion blur is 0.5. The shutter angle is 180. Thats all I Know. I've not touched motion blur in Soft yet as Im learning but I know thats how a camera works and I've used motion blur in 3D Studio. I could probably have explained myself alot better but I couldn't help myself, sorry. I hope I've helped though I probably haven't.
Knick Knack
