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Yeah, I remember now him showing me how the cars disappeared on one of his photos when he was stacking. I am assuming he already knows this, but it is a good reminder. What is the program you are using. I am not sure what he uses, but when I do my photos (nothing as amazing as yours) I use photoshop.

I use a range of software. Mostly Adobe Lightroom but also Photoshop when required. Sequator is good for star stacking. I also use Microsoft ICE for complex panoramic stitches.

Oh, okay, I haven't tried Lightroom, but Scott has. I think that is what he uses for the star photos. Thanks for sharing that.