Star trail video, Elbert, CO
 
I posted the image created by stacking and blending multiple night sky photos together.  When we take these photos with a wide aperture, long exposure and higher than normal ISO we end up with some really great photos of the night sky.  Now, take this a step further and treat each image as a video clip and you end up with a great time lapse of the night sky.  I like to think I'm like most people and want to take this a bit further.  In this case, I wanted to make the star trails "build" throughout the movie.  I spent a lot of time researching other folk's methods to create this effect.  Unfortunately, most of those techniques came with a price tag in the form of expensive software such as Adobe After Effects.  In this case, I was able to do it all in Photoshop.  Don't get me wrong, Photoshop is not cheap, but I use Photoshop every day and I just can't justify the cost of After Effects for the occasional video.