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Points may be motion-blurred as well. In this picture, the camera has been rotated to generate a picture reminiscent of star trails.
You can also create fire or explosion effects using points as shown below. Here a particle system was used to generate one hundred thousand particles originating from four sources. The shader sets the opacity to 0 causing the particle intensities to accumulate. At the center of an explosion where many particles overlap this gives the illusion of a glowing hot center.
