What is StarStaX?
Type ‘starstax’ into Google and it will take you to Markus Enzweiler’s website (markusenzweiler.de). He developed the software and makes it freely available to Mac and Windows users. All you have to do is drop your star-trails sequence files onto the interface and click ‘Start Processing’ and the software merges the files together. To complete the process, you simply save the final image and you’re done. StarStaX is certainly the quickest and easiest software option, but there is an alternative. You can use Photoshop to merge the files together, either manually or by creating a bespoke action. The technique consists of copying and pasting each file onto one starting image, changing each Layer’s Blending Mode to Lighten. If your image has foreground interest, keep the bottom Layer’s Blending Mode as Normal.