This particle effect may be used to fade the different particles out within a given time. Animate the frame value for nice looking animations.
The line rain operator may be used for eyecatching transitions. The lines `rain` down (or in any horizontal or vertical direction) with a given speed and gravity. Animate the frame paramter for nice results.
Using this operator you can `scale` the height of the images. Opposite to real scaling the image will not get bigger but keeps the same size and only the input-parts of the image keep visible. If it is stretched by a factor of 2 you can see only every second line on the image. All others are empty (you see the background). If you animate the frame value from 1 to frames then the image is stretched until no line of the image is visible!